Western jackdaw

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Western jackdaw
Galka (Corvus monedula), Tsaritsyno.jpg
Coloeus monedula
Western jackdaw calls (Estonia)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Corvidae
Genus: Coloeus
Species:
C. monedula
Binomial name
Coloeus monedula
Corvus monedula distribution de.svg
   Jackdaw range
   summer-only range
   winter visitor only
Synonyms

Corvus monedula Linnaeus, 1758

Adult Birds of Sweden 2016 53.jpg
Adult
Juvenile Birds of Sweden 2016 54.jpg
Juvenile

The western jackdaw (Coloeus monedula), also known as the Eurasian jackdaw, the European jackdaw, or simply the jackdaw, is a passerine bird in the crow family. Found across Europe, western Asia and North Africa; it is mostly resident, although northern and eastern populations migrate south in the winter. Four subspecies are recognised, which differ mainly in the colouration of the plumage on the head and nape. Linnaeus first described it formally, giving it the name Corvus monedula. The common name derives from the word jack, denoting "small", and daw, a less common synonym for "jackdaw", and the native English name for the bird.

Contents

Measuring 34–39 centimetres (13–15 in) in length, the western jackdaw is a black-plumaged bird with a grey nape and distinctive pale-grey irises. It is gregarious and vocal, living in small groups with a complex social structure in farmland, open woodland, on coastal cliffs, and in urban settings. Like its relatives, jackdaws are intelligent birds, and have been observed using tools. An omnivorous and opportunistic feeder, it eats a wide variety of plant material and invertebrates, as well as food waste from urban areas. Western jackdaws are monogamous and build simple nests of sticks in cavities in trees, cliffs, or buildings. About five pale blue or blue-green eggs with brown speckles are laid and incubated by the female. The young fledge in four to five weeks.

Systematics

Etymology

The western jackdaw was one of the many species originally described by Carl Linnaeus in his 18th century work Systema Naturae . [2] Owing to its supposed fondness for picking up coins, Linnaeus gave it the binomial name Corvus monedula, choosing the specific name mǒnēdŭla, which is derived from moneta , the Latin stem of the word "money". [3] [4] Jackdaws are sometimes placed in the genus Coloeus , from the Ancient Greek κολοιός (koloios) for jackdaw, [5] though most subsequent works have retained the two jackdaw species in Corvus. [6]

The original Old English words ċēo and ċeahhe (pronounced with initial ch) gave modern English "chough"; Chaucer sometimes used this word to refer to the western jackdaw, [7] as did Shakespeare in Hamlet although there has been debate about which species he was referring to. [8] This onomatopoeic name, based on the western jackdaw's call, now refers to corvids of the genus Pyrrhocorax ; the red-billed chough (Pyrrhocorax pyrrhocorax), formerly particularly common in Cornwall, became known initially as the "Cornish chough" and then just the "chough", the name transferring from one species to the other. [9]

The common name jackdaw first appeared in the 16th century, and is thought to be a compound of the forename Jack, used in animal names to signify a small form (e.g. jack snipe), and the archaic native English word daw. [10] Formerly, western jackdaws were simply called "daws". [7] The metallic chyak call may be the origin of the jack part of the common name, [11] but this is not supported by the Oxford English Dictionary . [12] Daw, first used for the bird in the 15th century, is held by the Oxford English Dictionary to be derived from the postulated Old English dawe, citing the cognates in Old High German tāha, Middle High German tāhe or tāchele, and modern German Dahle or Dohle, and dialectal Tach, Dähi, Däche and Dacha.

Names in English dialects are numerous. Scottish and north English dialects have included ka or kae since the 14th century. The Midlands form of this word was co or coo. Caddow is potentially a compound of ka and dow, a variant of daw. Other dialectal or obsolete names include caddesse, cawdaw, caddy, chauk, college-bird, jackerdaw, jacko, ka-wattie, chimney-sweep bird (from their nesting propensities), and sea-crow (from the frequency with which they are found on coasts). It was also frequently known quasi-nominally as Jack. [13] [14] [15] [16]

An archaic collective noun for a group of jackdaws is a "clattering". [17] Another name for a flock is a "train". [18]

Taxonomy

A study in 2000 found that the genetic distance between western jackdaws and the other members of Corvus was greater than that within the rest of the genus. [19] This led Pamela Rasmussen to reinstate the genus name Coloeus, created by Johann Kaup in 1829, [20] in her Birds of South Asia (2005), [21] a treatment also used in a 1982 systematic list in German by Hans Edmund Wolters. [22] A study of corvid phylogeny undertaken in 2007 compared DNA sequences in the mitochondrial control region of several corvids. It found that the western jackdaw, and the closely related Daurian jackdaw (C. dauuricus) of eastern Russia and China, were basal to the core Corvus clade. [23] The names Coloeus monedula and Coloeus dauuricus have since been adopted by the International Ornithological Congress in their official list. [24] The two species of jackdaw have been reported to hybridise in the Altai Mountains, southern Siberia, and Mongolia. Analysis of the mitochondrial DNA of specimens of the two species from their core ranges show them to be genetically distinct. [23]

Subspecies

C. m. monedula in Sweden. This subspecies has a whitish partial collar. Coloeus monedula -Munkedal, Vastra Gotaland, Sweden-8.jpg
C. m. monedula in Sweden. This subspecies has a whitish partial collar.

There are four recognized subspecies of the western jackdaw. [13] [25] All European subspecies intergrade where their populations meet. [26] C. m. monedula intergrades into C. m. soemmerringii in a transition zone running from Finland south across the Baltic and eastern Poland to Romania and Croatia. [27]

Description

Adult C. m. spermologus, showing the rictal bristles cover much of the bill. Jackdaw - up close and personal (552502080).jpg
Adult C. m. spermologus, showing the rictal bristles cover much of the bill.
Juvenile C. m. spermologus, Newcastle upon Tyne, England. Coloeus monedula, juvenile, Newcastle upon Tyne, England.jpg
Juvenile C. m. spermologus, Newcastle upon Tyne, England.
Partially leucistic individual with white feathers in Naantali cemetery, Naantali, Finland CROP. Corvus monedula, naakka, Naantalin hautausmaa, Naantali, 8.11.2011..jpg
Partially leucistic individual with white feathers in Naantali cemetery, Naantali, Finland

The western jackdaw measures 34–39 centimetres (13–15 in) in length and weighs around 240 grams (8.5 oz). [32] [33] Most of the plumage is a shiny black, with a purple (in subspecies monedula and spermologus) or blue (in subspecies cirtensis and soemmerringii) sheen on the crown, [34] forehead, and secondaries, and a green-blue sheen on the throat, primaries, and tail. The cheeks, nape and neck are light grey to greyish-silver, and the underparts are slate-grey. The legs are black, as is the short stout bill, [32] the length of which is about 75% of the length of the rest of the head. [34] There are rictal bristles covering around 40% of the maxilla and 25% of the lower mandible. [34] The irises of adults are greyish or silvery white while those of juveniles are light blue, becoming brownish before whitening at around one year of age. [32] The sexes look alike, [13] [35] though the head and neck plumage of male birds fades more with age and wear, particularly just before moulting. [36] Western jackdaws undergo a complete moult from June to September in the western parts of their range, and a month later in the east. [28] The purplish sheen of the cap is most prominent just after moulting. [36]

Immature birds have duller and less demarcated plumage. [37] The head is a sooty black, sometimes with a faint greenish sheen and brown feather bases visible; the back and side of the neck are dark grey and the underparts greyish or sooty black. The tail has narrower feathers and a greenish sheen. [36]

There is very little geographic variation in size. The main differences are the presence or absence of a whitish partial collar at the base of the nape, the variations in the shade of the nape and the tone of the underparts. Populations in central Asia have slightly larger wings and western populations have a slightly heavier bill. Body colour becomes darker further north, in mountain regions and humid climates, and paler elsewhere. However, individual variation, particularly in juveniles and also during the months before moulting, can often be greater than geographic differences. [34]

A skilled flyer, the western jackdaw can manoeuvre tightly as well as tumble and glide. It has characteristic jerky wing beats when flying, though these are not evident when birds are migrating. [37] Wind tunnel experiments show that the preferred gliding speed is between 6 and 11 metres (20 and 36 ft) per second and that the wingspan decreases as the bird flies faster. [38] On the ground, western jackdaws have an upright posture and strut briskly, their short legs giving them a rapid gait. They feed with their heads held down or horizontally. [37]

Within its range, the western jackdaw is unmistakable; its short bill and grey nape are distinguishing features. From a distance, it can be confused with a rook (Corvus frugilegus), or when in flight, with a pigeon or chough. [37] Flying western jackdaws are distinguishable from other corvids by their smaller size, faster and deeper wingbeats and proportionately narrower and less fingered wing tips. They also have shorter, thicker necks, much shorter bills and frequently fly in tighter flocks. They can be distinguished from choughs by their uniformly grey underwings and their black beaks and legs. [39] The western jackdaw is very similar in morphology, behaviour, and calls to the Daurian jackdaw, with which its range overlaps in western Asia. Adults are readily distinguished, since the Daurian has a pied plumage, but immature birds are much more similar, both species having dark plumage and dark eyes. The Daurian tends to be darker, with a less contrasting nape than the Western. [40]

Vocalisations

Western jackdaw calling in flight on Inisheer, Ireland Western Jackdaws on Inisheer (flying).jpg
Western jackdaw calling in flight on Inisheer, Ireland

Western jackdaws are voluble birds. The main call, frequently given in flight, is a metallic and squeaky chyak-chyak or kak-kak. [13] This is a contact or greeting call. A feeding call made by adults to call young, or males when offering food to their mates, has been transcribed as kiaw or kyow. Females in return give a more drawn out version when begging for food from males, written as kyaay, tchaayk or giaaaa. [41] Perched birds often chatter together, and before settling for the night, large roosting flocks make a cackling noise. Western jackdaws also have a hoarse, drawn-out alarm call, [13] arrrrr or kaaaarr, used when warning of predators or when mobbing them. [41] Nestlings begin making a soft cheep at about a week of age. As they grow, their voice becomes louder until their call is a penetrating screech around day 18. After this, the voice deepens and softens. [42] From day 25, the young cease calling and become silent if they hear an unfamiliar noise. [43] The European jackdaw can be trained to imitate human speech. [44]

Distribution and habitat

The western jackdaw is found from Northwest Africa through all of Europe, except for the subarctic north, and eastwards through central Asia to the eastern Himalayas and Lake Baikal. To the east, it occurs throughout Turkey, the Caucasus, Iran, Iraq, Afghanistan, Pakistan, and northwestern India. [26] However, it is regionally extinct in Malta and Tunisia. [1] The range is vast, with an estimated global extent between 1 and 10 million square kilometres (0.4–4 million square miles). It has a large global population, with an estimated 15.6 to 45 million individuals in Europe alone. [45] Censuses of bird populations in marginal uplands in Great Britain show that western jackdaws greatly increased in numbers between the 1970s and 2010, although this increase may be related to recovery from previous periods when they were regarded as pests. [46] The UK population was estimated at 2.5 million individuals in 1998, up from 780,000 in 1970. [47]

A western jackdaw on Inisheer, Ireland Western Jackdaw on Inisheer (perched).jpg
A western jackdaw on Inisheer, Ireland

Most populations are resident, but the northern and eastern populations are more migratory, [27] relocating to wintering areas between September and November and returning between February and early May. [48] Their range expands northwards into Russia to Siberia during summer and retracts in winter. [13] They are vagrants to the Faroe Islands, particularly in the winter and spring, and occasionally to Iceland. [37] Elsewhere, western jackdaws congregate over winter in the Ural Valley in northwestern Kazakhstan, the northern Caspian, and the Tian Shan region of western China. They are winter visitors to the Quetta Valley in western Pakistan, [48] and are winter vagrants to Lebanon, where they were first recorded in 1962. [49] In Syria, they are winter vagrants and rare residents with some confirmed breeding taking place. [50] The subspecies soemmerringii occurs in south-central Siberia and extreme northwestern China and is accidental to Hokkaido, Japan. [51] A small number of western jackdaws reached northeastern North America in the 1980s and have been found from Atlantic Canada to Pennsylvania. [52] They have also occurred as vagrants in Gibraltar, Mauritania, and Saint Pierre and Miquelon, [1] and one is reported to have been seen in Egypt. [26]

Western jackdaws inhabit wooded steppes, pastures, cultivated land, coastal cliffs, and towns. They thrive when forested areas are cleared and converted to fields and open areas. [26] Habitats with a mix of large trees, buildings, and open ground are preferred; open fields are left to the rook, and more wooded areas to the Eurasian jay (Garrulus glandarius). [37] Along with other corvids such as the rook, common raven (Corvus corax), and hooded crow (C. cornix), some western jackdaws spend the winter in urban parks; populations measured in three urban parks in Warsaw show increases from October to December, possibly due to western jackdaws migrating there from areas further north. [53] The same data from Warsaw, collected from 1977 to 2003, showed that the wintering western jackdaw population had increased four-fold. The cause of the increase is unknown, but a reduction in the number of rooks may have benefited the species locally, or rooks overwintering in Belarus may have caused western jackdaws to relocate to Warsaw. [54]

Behaviour

A family group in Bushy Park, London. Coloeus monedula -Bushy Park, London Borough of Richmond upon Thames, England -several-8 (1).jpg
A family group in Bushy Park, London.
A western jackdaw in flight. 2013 Fliegende Dohle.JPG
A western jackdaw in flight.

Generally wary of people in the forest or countryside, western jackdaws are much tamer in urban areas. [55]

Highly gregarious, western jackdaws are generally seen in flocks of varying sizes, though males and females pair-bond for life and pairs stay together within flocks. [56] Flocks increase in size in autumn and birds congregate at dusk for communal roosting, [13] with up to several thousand individuals gathering at one site. At Uppsala, Sweden, 40,000 birds have been recorded at a single winter roost with mated pairs often settling together for the night. [55] Western jackdaws frequently congregate with hooded crows [35] or rooks, [37] the latter particularly when migrating or roosting. [57] They have been recorded foraging with the common starling (Sturnus vulgaris), Northern lapwing (Vanellus vanellus), and common gull (Larus canus) in northwestern England. [57] Flocks are targets of coordinated hunting by pairs of lanner falcons (Falco biarmicus), although larger groups are more able to elude the predators. [58] Western jackdaws sometimes mob and drive off larger birds such as European magpies, common ravens, or Egyptian vultures (Neophron percnopterus); one gives an alarm call which alerts its conspecifics to gather and attack as a group. [43] Occasionally, a sick or injured western jackdaw is mobbed until it is killed. [59]

In his book King Solomon's Ring , Konrad Lorenz described and analysed the complex social interactions in a western jackdaw flock that lived around his house in Altenberg, Austria. He ringed them for identification and caged them in the winter to prevent their annual migration. He found that the birds have a linear hierarchical group structure, with higher-ranked individuals dominating lower-ranked birds, and pair-bonded birds sharing the same rank. [60] Young males establish their individual status before pairing with females. Upon pairing, the female assumes the same social position as her partner. Unmated females are the lowest members in the pecking order, and are the last to have access to food and shelter. [60] Lorenz noted one case in which a male, absent during the dominance struggles and pair bondings, returned to the flock, became the dominant male, and chose one of two unpaired females for a mate. This female immediately assumed a dominant position in the social hierarchy and demonstrated this by pecking others. According to Lorenz, the most significant factor in social behaviour was the immediate and intuitive grasp of the new hierarchy by each of the western jackdaws in the flock. [60]

Social displays

Social hierarchy in western jackdaw flocks is determined by supplanting, fighting, and threat displays—several of which have been described. In the bill-up posture, the western jackdaw tilts its bill and head upwards and sleeks its plumage. Indicating both appeasement and assertiveness, the posture is used by birds intending to enter feeding flocks. A bill-down posture is another commonly used agonistic behaviour. In this display, a bird lowers its bill and erects its nape and head feathers, and sometimes slightly lifts its wings. Western jackdaws often face off in this posture until one backs down or a fight ensues. In the forward-threat posture, a bird holds its body horizontally and thrusts its head forwards. In intense versions, the bird ruffles its feathers and spreads or raises its tail and wings. This extreme is seen when facing off over nests or females. [61] In the defensive-threat posture, the bird lowers its head and bill, spreads its tail and ruffles its feathers. Supplanting is where one bird moves in and displaces another from a perch-site. The second bird usually retreats without resorting to a fight. Western jackdaws fight by launching themselves at each other feet-first and then wrestling with their feet intertwined and pecking at each other. Other individuals gather and call noisily. [62]

Western jackdaws entreat their partners to preen them by showing their nape and ruffling their head feathers. Birds mainly preen each other's head and neck. Known as allopreening, this behaviour is almost always done between birds of a mated pair. [62]

Breeding

Occupying a hole in a wall at Conwy Castle, Wales. Coloeus monedula -Conwy Castle, Clwyd, Wales-8 (2).jpg
Occupying a hole in a wall at Conwy Castle, Wales.
Nest with a chick and eggs. Jackdaw brood.jpg
Nest with a chick and eggs.
Eggs, Collection Museum Wiesbaden Corvus monedula MWNH 2325.JPG
Eggs, Collection Museum Wiesbaden
Fledgling C. m. spermologus in southern England. Corvus monedula fledgling 2.jpg
Fledgling C. m. spermologus in southern England.

Western jackdaws become sexually mature in their second year. Genetic analysis of pairs and offspring shows no evidence of extra-pair copulation [56] and there is little evidence for couple separation even after multiple instances of reproductive failure. [63] Some pairs do separate in the first few months, but almost all pairings of over six months' duration are lifelong, ending only when a partner dies. [57] Widowed or separated birds fare badly, often being ousted from nests or territories and unable to rear broods alone. [57]

Western jackdaws usually breed in colonies with pairs collaborating to find a nest site, which they then defend from other pairs and predators during most of the year. [63] They nest in cavities in trees or cliffs, in ruined or occupied buildings and in chimneys, the common feature being a sheltered site for the nest. The availability of suitable sites influences their presence in a locale. [37] They may also use church steeples for nesting, a fact reported in verse by 18th century English poet William Cowper:

A great frequenter of the church,
 Where, bishoplike, he finds a perch,

And dormitory too. [64]

Nest platforms can attain a great size. A mated pair usually constructs a nest by improving a crevice by dropping sticks into it; it is then built on top of the platform formed. [59] This behaviour has led to the blocking of chimneys and even resulted in nests crashing down into fireplaces, sometimes with birds still on them. [65]

In his The Natural History of Selborne , Gilbert White notes that western jackdaws used to nest in crevices beneath the lintels of Stonehenge, and describes an example of the bird using a rabbit burrow for nesting. [18] The species has been recorded outcompeting the tawny owl (Strix aluco) for nest sites in the Netherlands. [66] They can take over old nest sites of the black woodpecker (Dryocopus martius) [67] and stock dove (Columba oenas). [62] Breeding colonies may also edge out those of the red-billed chough, but in turn be ousted by larger corvids such as the carrion crow, rook or magpie. [62]

Nests are lined with hair, wool, dead grass and many other materials. [68] The eggs are a lighter colour than those of other corvids, [69] being smooth, a glossy pale blue or blue-green with darker speckles ranging from dark brown to olive or grey-violet. [70] Egg size and weight varies slightly between subspecies; those of subspecies monedula average 35.0 by 24.7 millimetres (1.38 in × 0.97 in) and 11.1 g (0.39 oz) in weight, those of subspecies soemmerringii34.8 by 25.0 millimetres (1.37 in × 0.98 in) in size and 11.3 g (0.40 oz) in weight, and those of subspecies spermologus35.0 by 25.2 millimetres (1.38 in × 0.99 in) in size and 11.5 g (0.41 oz) in weight. [70] Clutches usually contain 4 or 5 eggs, [68] although a Slovakian study found clutch sizes ranging from 2 to 9 eggs. [71] The eggs are incubated by the female for 17–18 days until hatching as naked altricial chicks, which are completely dependent on the adults for food. They fledge after 28–35 days, [68] and the parents continue to feed them for another four weeks or so. [57]

Western jackdaws hatch asynchronously and incubation begins before clutch completion, which often leads to the death of the last-hatched young. If the supply of food is low, parental investment in the brood is kept to a minimum as little energy is wasted on feeding a chick that is unlikely to survive. [72] Replacement clutches are very rarely laid in the event of clutch failure. [70]

The great spotted cuckoo (Clamator glandarius) has been recorded as a brood parasite of the western jackdaw, depositing its eggs in their nests in Spain and Israel. [73] [74] Nest robbers include the common raven in Spain, tawny owl, and least weasel (Mustela nivalis) in England, and brown rat (Rattus norvegicus) in Finland. [75] The European pine marten (Martes martes) raids isolated nests in Sweden but is less successful when nests are part of a colony. [67]

Feeding

C. m. soemmerringii, foraging in pasture in Russia. Corvus monedula 009.jpg
C. m. soemmerringii, foraging in pasture in Russia.

Foraging takes place mostly on the ground in open areas and to some extent in trees. [26] Landfill sites, bins, streets, and gardens are also visited, more often early in the morning when there are fewer people about. [26] Various feeding methods are employed, such as jumping, pecking, clod-turning and scattering, probing the soil, and occasionally, digging. Flies around cow pats are caught by jumping from the ground or at times by dropping vertically from a few metres onto the cow pat. Earthworms are not usually extracted from the ground by western jackdaws but are eaten from freshly ploughed soil. [76] Jackdaws will ride on the backs of sheep and other mammals, seeking ticks as well as actively gathering wool or hair for nests, and will catch flying ants in flight. [40] Compared with other corvids, the western jackdaw spends more time exploring and turning over objects with its bill; it also has a straighter and less downturned bill and increased binocular vision which are advantageous for this foraging strategy. [77]

The western jackdaw tends to feed on small invertebrates up to 18 millimetres (0.71 in) in length that are found above ground, including various species of beetle (particularly cockchafers of the genus Melolontha , [78] and weevil larvae and pupae. [76] ), Diptera , and Lepidoptera species, as well as snails and spiders. Also eaten are small rodents, bats, [79] the eggs and chicks of birds, and carrion such as roadkill. Vegetable items consumed include farm grains (barley, wheat and oats), weed seeds, elderberries, acorns, and various cultivated fruits. [76] Examination of the gizzards of western jackdaws shot in Cyprus in spring and summer revealed a diet of cereals (predominantly wheat) and insects (notably cicadas and beetles). [80] The diet averages 84% plant material except when breeding, when the main food source is insects. [40] A study in southern Spain examining western jackdaw pellets found that they contained significant amounts of silicaceous and calcareous grit to aid digestion of vegetable food and supply dietary calcium. [81]

Opportunistic and highly adaptable, the western jackdaw varies its diet markedly depending on available food sources. [82] They have been recorded taking eggs and nestlings from the nests of the skylark (Alauda arvensis), [83] Manx shearwater (Puffinus puffinus), razorbill (Alca torda), common guillemot (Uria aalge), grey heron (Ardea cinerea), [78] rock dove (Columba livia), [84] and Eurasian collared dove (Streptopelia decaocto). [78] A field study of a large city dump on the outskirts of León in northwestern Spain showed that western jackdaws forage there in the early morning and at dusk, and engage in some degree of kleptoparasitism. [85] The saker falcon (Falco cherrug) has been reported stealing food from western jackdaws on powerlines in Vojvodina in Serbia. [86]

Western jackdaws practice active food sharing – where the initiative for the transfer lies with the donor – with a number of individuals, regardless of sex or kinship. They also share more of a preferred food than a less preferred food. [87] The active giving of food by most birds is found mainly in the context of parental care and courtship. Western jackdaws show much higher levels of active giving than has been documented for other species, including chimpanzees. The function of this behaviour is not fully understood, though it has been found to be detached from nutrition and compatible with hypotheses of mutualism, reciprocity and harassment avoidance. It has also been proposed that food sharing may be motivated by prestige enhancement. [88]

Parasites and diseases

Western jackdaws have learned to peck open the foil caps of milk bottles left on the doorsteps after delivery by the milkman. The bacterium Campylobacter jejuni has been isolated from their beaks and cloacae so milk can become contaminated as they drink. This activity was linked to cases of Campylobacter gastroenteritis in Gateshead in northeast England [89] and led the Department of Health to suggest that milk from bottles which had been pecked open should be discarded. It was recommended that steps be taken to prevent birds from pecking open bottles in the future. [90]

An outbreak of a gastrointestinal illness in Spain which was causing mortalities in humans has been linked to western jackdaws. During a post-mortem on an affected bird, a polyomavirus was isolated from the spleen. The illness appeared to be a co-infection of this with Salmonella and the virus has been provisionally named the crow polyomavirus (CPyV). [91] Segmented filamentous bacteria have been isolated from the small intestine of a western jackdaw, although their pathogenicity or role is unknown. [92]

Pest control

The western jackdaw has been hunted as vermin, though not as heavily culled as other species of corvid. [93] After a series of poor harvests in the early 1500s, Henry VIII introduced a Vermin Act in 1532 "ordeyned to dystroye Choughes (i.e. jackdaws), Crowes and Rokes" to protect grain crops from their predations. Western jackdaws were notorious as they also favoured fruit, especially cherries. This act was taken up in a piecemeal fashion, but Elizabeth I passed the Act for the Preservation of Grayne in 1566 that was taken up with more vigour. The species was hunted for its threat to grain crops and for propensity for nesting in belfries until the mid-20th century. Particularly large numbers were culled in the county of Norfolk. Western jackdaws were also culled on game estates as they raid nests of other birds for eggs. [94] In a 2003 dissertation on public opinion of corvids, Antonia Hereth notes that the German naturalist Alfred Brehm considered the western jackdaw to be a lovable bird, and did not describe any negative impacts of this species on agriculture. [95]

The western jackdaw is one of a very small number of birds that it is legal to use as a decoy or to trap in a cage in the United Kingdom. The other pest species that can be controlled by trapping are the crow, jay, magpie and rook. An authorised person must comply with the requirements of the Wildlife and Countryside Act 1981 and does not need to show that the birds were a nuisance before trapping them. [96] As of 2003 the western jackdaw was listed as a potential species for targeted hunting in the European Union Birds Directive, and hunting has been encouraged by German hunting associations. [95] Permission to shoot western jackdaws in spring and summer exists in Cyprus as they are thought (incorrectly) to prey on gamebirds. [80]

Cultural depictions and folklore

Harrison Weir's 1881 illustration of a vain jackdaw wearing peacock feathers for "The Bird in Borrowed Feathers" (also known as "The Vain Jackdaw") fable Borrowed plumes.jpg
Harrison Weir's 1881 illustration of a vain jackdaw wearing peacock feathers for "The Bird in Borrowed Feathers" (also known as "The Vain Jackdaw") fable
A jackdaw pictured in the coat of arms of the Sauvo municipality Sauvo.vaakuna.svg
A jackdaw pictured in the coat of arms of the Sauvo municipality

An ancient Greek and Roman adage runs "The swans will sing when the jackdaws are silent", meaning that educated or wise people will speak only after the foolish have become quiet. [98] In Ancient Greek folklore, a jackdaw can be caught with a dish of oil. A narcissistic creature, it falls in while looking at its own reflection. [99] The mythical Princess Arne Sithonis was bribed with gold by King Minos of Crete, and was punished by the gods for her greed by being transformed into an equally avaricious jackdaw, who still seeks shiny things. [100] The Roman poet Ovid described jackdaws as harbingers of rain in his poetic work Amores . [101] Pliny notes how the Thessalians, Illyrians, and Lemnians cherished jackdaws for destroying grasshoppers' eggs. The Veneti are fabled to have bribed the jackdaws to spare their crops. [99]

In some cultures, a jackdaw on the roof is said to predict a new arrival; alternatively, a jackdaw settling on the roof of a house or flying down a chimney is an omen of death, and coming across one is considered a bad omen. [101] A jackdaw standing on the vanes of a cathedral tower is said to foretell rain. The 12th-century historian William of Malmesbury records the story of a woman who, upon hearing a jackdaw chattering "more loudly than usual," grew pale and became fearful of suffering a "dreadful calamity", and that "while yet speaking, the messenger of her misfortunes arrived". [102] Czech superstition formerly held that if jackdaws are seen quarreling, war will follow, and that jackdaws will not build nests at Sázava after being banished by Saint Procopius. [16]

The jackdaw was considered sacred in Welsh folklore as it nested in church steeples – it was shunned by the Devil because of its choice of residence. [103] Nineteenth century belief in the Fens held that seeing a jackdaw on the way to a wedding was a good omen for a bride. [104]

The jackdaw is featured on the Ukrainian town of Halych's ancient coat of arms, the town's name allegedly being derived from the East Slavic word for the bird. [105] In The Book of Laughter and Forgetting (1979), Milan Kundera notes that Franz Kafka's father Hermann had a sign in front of his shop with a jackdaw painted next to his name, since "kavka" means jackdaw in Czech. [106]

In the video game Assassin's Creed IV: Black Flag , the main character's ship is named the Jackdaw.[ citation needed ]

Related Research Articles

<span class="mw-page-title-main">Corvidae</span> Family of perching birds

Corvidae is a cosmopolitan family of oscine passerine birds that contains the crows, ravens, rooks, magpies, jackdaws, jays, treepies, choughs, and nutcrackers. In colloquial English, they are known as the crow family or corvids. Currently, 135 species are included in this family. The genus Corvus containing 47 species makes up over a third of the entire family. Corvids (ravens) are the largest passerines.

<span class="mw-page-title-main">Red-billed chough</span> Bird in the crow family from Eurasia and North Africa

The red-billed chough, Cornish chough or simply chough, is a bird in the crow family, one of only two species in the genus Pyrrhocorax. Its eight subspecies breed on mountains and coastal cliffs from the western coasts of Ireland and Britain east through southern Europe and North Africa to Central Asia, India and China.

<span class="mw-page-title-main">Alpine chough</span> Bird in the crow family

The Alpine chough or yellow-billed chough is a bird in the crow family, one of only two species in the genus Pyrrhocorax. Its two subspecies breed in high mountains from Spain eastwards through southern Europe and North Africa to Central Asia and Nepal, and it may nest at a higher altitude than any other bird. The eggs have adaptations to the thin atmosphere that improve oxygen take-up and reduce water loss.

<span class="mw-page-title-main">Carrion crow</span> Species of bird

The carrion crow is a passerine bird of the family Corvidae, native to western Europe and the eastern Palearctic.

<span class="mw-page-title-main">Hooded crow</span> Species of bird

The hooded crow, also called the scald-crow or hoodie, is a Eurasian bird species in the genus Corvus. Widely distributed, it is found across Northern, Eastern, and Southeastern Europe, as well as parts of the Middle East. It is an ashy grey bird with black head, throat, wings, tail, and thigh feathers, as well as a black bill, eyes, and feet. Like other corvids, it is an omnivorous and opportunistic forager and feeder.

<span class="mw-page-title-main">Australian raven</span> Passerine bird native to Australia

The Australian raven is a passerine corvid bird native to Australia. Measuring 46–53 centimetres (18–21 in) in length, it has an all-black plumage, beak and mouth, as well as strong, greyish-black legs and feet. The upperparts of its body are glossy, with a purple-blue, greenish sheen; its black feathers have grey bases. The Australian raven is distinguished from the Australian crow, and other related corvids, by its long chest feathers, or throat hackles, which are prominent in mature birds. Older individuals and subadults have white irises, while the younger birds' eyes display blue inner rims; hatchlings and young birds have brown, dark irises until about fifteen months of age, at which point their irises become hazel-coloured, with an inner blue rim around each pupil, this lasting until they are roughly 2.5 to 3 years of age. Nicholas Aylward Vigors and Thomas Horsfield described the Australian raven in 1827, its species name coronoides highlighting its similarity with the carrion crow. Two subspecies are recognised, which differ slightly in their vocalisations, and are quite divergent, genetically.

<span class="mw-page-title-main">Torresian crow</span> Species of bird

The Torresian crow, also called the Australian crow or Papuan crow, is a passerine bird in the crow family native to the north and west of Australia and nearby islands in Indonesia and Papua New Guinea. The species has a black plumage, beak and mouth with white irises. The base of the feathers on the head and neck are white. The Torresian crow is slightly larger with a more robust bill than the morphologically similar little crow.

<span class="mw-page-title-main">Little crow (bird)</span> Species of bird

The little crow is an Australian species of crow, very similar to the Torresian crow in having white bases to the neck and head feathers but slightly smaller and with a slightly smaller bill. It has the same white iris that distinguish the Australian species from all other Corvus except a few island species to the north of Australia, and one from Eurasia, the jackdaw. Like the Australian raven, this species has a blue ring around the pupil.

<span class="mw-page-title-main">Forest raven</span> Australian native bird

The forest raven, also commonly known as the Tasmanian raven, is a passerine bird in the family Corvidae native to Tasmania and parts of southern Victoria, such as Wilsons Promontory and Portland. Populations are also found in parts of New South Wales, including Dorrigo and Armidale. Measuring 50–53 cm (20–21 in) in length, it has all-black plumage, beak and legs. As with the other two species of raven in Australia, its black feathers have grey bases. Adults have white irises; younger birds have dark brown and then hazel irises with an inner blue rim. New South Wales populations are recognised as a separate subspecies C. tasmanicus boreus, but appear to be nested within the Tasmanian subspecies genetically.

<span class="mw-page-title-main">Little raven</span> Species of bird

The little raven is a species of the family Corvidae that is native to southeastern Australia. An adult individual is about 48–50 cm (19–19.5 in) in length, with completely black plumage, beak, and legs; as with all Australian species of Corvus, the black feathers have a grey base, and the iris of the adult bird is white . Although the little raven was first named by Gregory Mathews in 1912, it was only in 1967 that there was consensus to separate it from the Australian raven as a distinct species.

<span class="mw-page-title-main">House crow</span> Species of bird

The house crow, also known as the Indian, greynecked, Ceylon or Colombo crow, is a common bird of the crow family that is of Asian origin but now found in many parts of the world, where they arrived assisted by shipping. It is between the jackdaw and the carrion crow in size but is slimmer than either. The forehead, crown, throat and upper breast are a richly glossed black, whilst the neck and breast are a lighter grey-brown in colour. The wings, tail and legs are black. There are regional variations in the thickness of the bill and the depth of colour in areas of the plumage.

<span class="mw-page-title-main">Eurasian jay</span> Species of bird

The Eurasian jay is a species of passerine bird in the crow family Corvidae. It has pinkish brown plumage with a black stripe on each side of a whitish throat, a bright blue panel on the upper wing and a black tail. The Eurasian jay is a woodland bird that occurs over a vast region from western Europe and north-west Africa to the Indian subcontinent and further to the eastern seaboard of Asia and down into south-east Asia. Across this vast range, several distinct racial forms have evolved which look different from each other, especially when comparing forms at the extremes of its range.

<span class="mw-page-title-main">Chough</span> Genus of birds

There are two species of passerine birds commonly called chough that constitute the genus Pyrrhocorax of the Corvidae (crow) family of birds. These are the red-billed chough, and the Alpine chough. The white-winged chough of Australia, despite its name, is not a true chough but rather a member of the family Corcoracidae and only distantly related.

<span class="mw-page-title-main">Daurian jackdaw</span> Species of bird of the genus Coloeus

The Daurian jackdaw is a bird in the crow family, Corvidae, native to eastern Asia. It is closely related to the western jackdaw. The name derives from the Dauria region of eastern Russia.

<span class="mw-page-title-main">Pied currawong</span> Medium-sized black passerine bird native to eastern Australia and Lord Howe Island

The pied currawong is a black passerine bird native to eastern Australia and Lord Howe Island. One of three currawong species in the genus Strepera, it is closely related to the butcherbirds and Australian magpie of the family Artamidae. Six subspecies are recognised. It is a robust crowlike bird averaging around 48 cm (19 in) in length, black or sooty grey-black in plumage with white undertail and wing patches, yellow irises, and a heavy bill. The male and female are similar in appearance. Known for its melodious calls, the species' name currawong is believed to be of indigenous origin.

<span class="mw-page-title-main">Brambling</span> Species of bird

The brambling is a small passerine bird in the finch family Fringillidae. It has also been called the cock o' the north and the mountain finch. It is widespread and migratory, often seen in very large flocks.

<span class="mw-page-title-main">Common raven</span> Large, black, passerine bird of the Northern Hemisphere

The common raven is a large all-black passerine bird. It is the most widely distributed of all corvids, found across the Northern Hemisphere. It is a raven known by many names at the subspecies level; there are at least eight subspecies with little variation in appearance, although recent research has demonstrated significant genetic differences among populations from various regions. It is one of the two largest corvids, alongside the thick-billed raven, and is possibly the heaviest passerine bird; at maturity, the common raven averages 63 centimetres in length and 1.47 kilograms in mass. Although their typical lifespan is considerably shorter, common ravens can live more than 23 years in the wild. Young birds may travel in flocks but later mate for life, with each mated pair defending a territory.

<i>Corvus</i> Genus of birds including crows, ravens and rooks

Corvus is a widely distributed genus of passerine birds ranging from medium-sized to large-sized in the family Corvidae. It includes species commonly known as crows, ravens, and rooks. The species commonly encountered in Europe are the carrion crow, hooded crow, common raven, and rook; those discovered later were named "crow" or "raven" chiefly on the basis of their size, crows generally being smaller. The genus name is Latin for "raven".

<span class="mw-page-title-main">Rook (bird)</span> Species of bird in the crow family Corvidae

The rook is a member of the family Corvidae in the passerine order of birds. It is found in the Palearctic, its range extending from Scandinavia and western Europe to eastern Siberia. It is a large, gregarious, black-feathered bird, distinguished from similar species by the whitish featherless area on the face. Rooks nest collectively in the tops of tall trees, often close to farms or villages; the groups of nests are known as rookeries.

<span class="mw-page-title-main">Jackdaw</span> Two species of bird

Jackdaws are two species of bird in the genus Coloeus closely related to, but generally smaller than, crows and ravens (Corvus). They have a blackish crown, wings, and tail, with the rest of their plumage paler. The word Coloeus is Neo-Latin, from the Ancient Greek for jackdaws: koloiós (κολοιός). They come from Asia, Europe, Africa and Siberia.

References

  1. 1 2 3 BirdLife International (2012). "Corvus monedula". IUCN Red List of Threatened Species . 2012. Retrieved 26 November 2013.
  2. ↑ Linnaeus, C. (1758). Systema Naturae per Regna Tria Naturae, Secundum Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, Synonymis, Locis. Tomus I. Editio Decima, Reformata (in Latin). Vol. 1. Holmiae: Laurentius Salvius. p. 105.
  3. ↑ Simpson, D.P. (1979). Cassell's Latin Dictionary (5th ed.). London, United Kingdom: Cassell. p. 883. ISBN   978-0-304-52257-6.
  4. ↑ Valpy, Francis Edward Jackson (1828). An Etymological Dictionary of the Latin Language. London, United Kingdom: A. J. Valpy. p.  268. ISBN   978-1-4021-7384-4.
  5. ↑ Jobling, James (2010). The Helm Dictionary of Scientific Bird Names (PDF). London: Helm. p. 114. ISBN   978-1-4081-2501-4.
  6. ↑ Mayr, Ernst; Greenway, James C. Jr, eds. (1962). Check-List of Birds of the World. Vol. 15. Cambridge, Massachusetts: Museum of Comparative Zoology. p. 261.
  7. 1 2 Goodwin, p. 78
  8. ↑ Shakespeare, William; Edwards, Philip (2003). Hamlet, Prince of Denmark . Cambridge, United Kingdom: Cambridge University Press. p.  241. ISBN   978-0-521-53252-5.
  9. ↑ Cocker, Mark; Mabey, Richard (2005). Birds Britannica. London, United Kingdom: Chatto & Windus. pp. 406–8. ISBN   978-0-7011-6907-7.
  10. ↑ Partridge, Eric (1966). Origins: A Short Etymological Dictionary of Modern English. Routledge. ISBN   0-203-37182-8.
  11. ↑ Gains, David (1 July 2010). "British Garden Birds: Jackdaw". self. Retrieved 27 April 2012.
  12. ↑ "Jackdaw, n.". Oxford English Dictionary (2nd ed.). 1989.
  13. 1 2 3 4 5 6 7 Mullarney, Killian; Svensson, Lars; Zetterstrom, Dan; Grant, Peter (1999). Collins Bird Guide. Collins. p. 335. ISBN   978-0-00-219728-1.
  14. ↑ Swan, H. Kirke (1913). A Dictionary of English and Folk-Names of British Birds, With their History, Meaning and First Usage: and the Folk-lore, Weather-lore, Legends, etc., Relating to the More Familiar Species. London, United Kingdom: Witherby and Co. doi:10.5962/bhl.title.6948.
  15. ↑ Wright, Joseph (1898–1905). The English Dialect Dictionary. London, United Kingdom: Henry Frowde.
  16. 1 2 Swainson, Charles (1885). Provincial Names and Folk Lore of British Birds. London, United Kingdom: Trübner and Co.
  17. ↑ First recorded in John Lydgate's Debate between the Horse, Goose and Sheep (c.1430) as "A clatering of chowhis", and then in Juliana Berners' Book of Saint Albans (c.1480), as "a Clateryng of choughes".
  18. 1 2 White, Gilbert (1833). The Natural History of Selborne. London, United Kingdom: N. Hailes. p. 163.
  19. ↑ Kryukov, A. P.; Suzuki, H. (2000). "Phylogeography of Carrion, Hooded and Jungle crows (Aves, Corvidae) Inferred From Partial Sequencing of the Mitochondrial Cytochrome b Gene". Russian Journal of Genetics. 36: 922–29.
  20. ↑ Kaup, J. J. (1829). Skizzirte Entwickelungs-Geschichte und natürliches System der europäischen Thierwelt : Erster Theil welcher die Vogelsäugethiere und Vögel nebst Andeutung der Entstehung der letzteren aus Amphibien enthält. Darmstadt und Leipzig: Carl Wilhelm Leste. p. 114.
  21. 1 2 Rasmussen, Pamela C.; Anderton, John C. (2005). Birds of South Asia: The Ripley Guide. Vol. 2. Washington, D.C. and Barcelona, Spain: Smithsonian Institution and Lynx Edicions. p. 598. ISBN   978-84-87334-67-2.
  22. ↑ Wolters, Hans E. (1982). Die Vogelarten der Erde (in German). Hamburg & Berlin, Germany: Paul Parey. ISBN   978-3-490-09118-5.
  23. 1 2 Haring, Elisabeth; Gamauf, Anita; Kryukov, Alexey (2007). "Phylogeographic patterns in widespread corvid birds" (PDF). Molecular Phylogenetics and Evolution. 45 (3): 840–62. doi:10.1016/j.ympev.2007.06.016. PMID   17920300. Archived from the original (PDF) on 2020-11-29. Retrieved 2015-09-04.
  24. ↑ Gill, F.; Donsker, D., eds. (30 March 2011). "Vireos, Crows & Allies". IOC World Bird List: Version 2.8.3. WorldBirdNames.org. Archived from the original on 17 September 2011. Retrieved 29 June 2011.
  25. ↑ "Eurasian Jackdaw Corvus monedula". GlobalTwitcher.com. Archived from the original on 2011-07-11.
  26. 1 2 3 4 5 6 7 8 9 10 Goodwin, p. 75
  27. 1 2 Offereins, Rudy (2003). "Identification of eastern subspecies of Western Jackdaw and occurrence in the Netherlands". Dutch Birding. 25 (4): 209–220.
  28. 1 2 3 4 5 Cramp, p. 120.
  29. ↑ Dies, J. I.; Lorenzo, J. A.; Gutierrez, R.; García, E.; Gorospe, G.; Marti-Aledo, J.; Gutiérrez, P.; Vidal, C.; Sales, S.; López-Velasco, D. (2009). "Report on Rare Birds in Spain 2007". Ardeola. 56 (2): 309–44.
  30. ↑ "spermologos". Strong's Greek 4691. Retrieved 15 May 2012.
  31. ↑ Fischer, G. (1811). "Notice sur la Choucas de la Russie". Mémoires de la Société Impériale des Naturalistes de Moscou. 1: 3. Retrieved 17 May 2012.
  32. 1 2 3 Goodwin, p. 74
  33. ↑ Cramp, pp. 138–139.
  34. 1 2 3 4 Cramp, p. 139.
  35. 1 2 Porter, R. F.; Christensen, S.; Schiermacher-Hansen, F. (1996). Birds of the Middle East. Princeton, New Jersey: Princeton University Press. p. 405.
  36. 1 2 3 Cramp, p. 137.
  37. 1 2 3 4 5 6 7 8 Cramp, p. 121.
  38. ↑ Rosen, Mikael; Hedenstrom, Anders (2001). "Gliding Flight in a Jackdaw: A Wind Tunnel Study" (PDF). Journal of Experimental Biology. 204 (6): 1153–66. doi:10.1242/jeb.204.6.1153. PMID   11222131.
  39. ↑ Snow, David; Perrins, Christopher M., eds. (1998). The Birds of the Western Palearctic: Concise Edition (2 volumes). Oxford, United Kingdom: Oxford University Press. pp. 1466–68. ISBN   978-0-19-854099-1.
  40. 1 2 3 Madge, Steve; Burn, Hilary (1994). Crows and Jays: A Guide to the Crows, Jays and Magpies of the World. London, United Kingdom: A & C Black. pp. 136–37. ISBN   978-0-7136-3999-5.
  41. 1 2 Cramp, p. 133.
  42. ↑ Cramp, p. 134.
  43. 1 2 Cramp, p. 132.
  44. ↑ Ogilvie, Richard B.; Eisenbeis, Roland F. (6 April 1968). "Talking Birds". Nature Bulletin (301–A). Archived from the original on 28 July 2014. Retrieved 1 July 2014.
  45. ↑ "BirdLife International (2012) Species factsheet: Corvus monedula". Downloaded from birdlife.org. Retrieved 2012-05-01.
  46. ↑ Henderson, I. G.; Fuller, R. J.; Conway, G. J.; Gough, S. J. (2004). "Evidence for declines in populations of grassland-associated birds in marginal upland areas of Britain". Bird Study. 51: 12–19. doi: 10.1080/00063650409461327 . S2CID   83909080. The text reports large declines among summer populations between 1968-80 and 2000.
  47. ↑ Newson, Stuart E.; Woodburn, Rick J. W.; Noble, David G.; Baillie, Stephen R.; Gregory, Richard D. (2005). "Evaluating the Breeding Bird Survey for producing national population size and density estimates". Bird Study. 52: 42–54. doi: 10.1080/00063650509461373 . S2CID   87696240. The BBS has potential for producing better estimates of habitat-specific densities and population sizes for many UK bird populations than those available previously.
  48. 1 2 Cramp, p. 124.
  49. ↑ Ramadan-Jaradi, Ghassan; Bara, Thierry; Ramadan-Jaradi, Mona (2008). "Revised Checklist of the Birds of Lebanon". Sandgrouse. 30 (1): 22–69.
  50. ↑ Murdoch, D. A.; Betton, K. F. (2008). "A Checklist of the Birds of Syria". Sandgrouse (Supplement 2): 12.
  51. ↑ Brazil, Mark (2009). The Birds of East Asia. London, United Kingdom: A&C Black. p. 308. ISBN   978-0-7136-7040-0.
  52. ↑ Dunn, John L.; Alderfer, Jonathan (2006). National Geographic Field Guide to the Birds of North America (5th ed.). Washington, D.C.: National Geographic Society. p. 326.
  53. ↑ Żmihorski, Michał; Halba, Ryszard; Mazgajski, Tomasz D. (2010). "Long-term Spatio-temporal Dynamics of Corvids Wintering in Urban Parks of Warsaw, Poland" (PDF). Ornis Fennica. 87 (2): 61–68. Archived from the original (PDF) on October 7, 2011.
  54. ↑ Mazgajski, Tomasz D.; Żmihorski, Michał; Halba, Ryszard; Wozniak, Agnieszka (2008). "Long-term Population Trends of Corvids Wintering in Urban Parks in Central Poland" (PDF). Polish Journal of Ecology. 56 (3): 521–26.
  55. 1 2 Cramp, p. 129.
  56. 1 2 Henderson, I. G.; Hart, P. J. B.; Burke, T. (2000). "Strict Monogamy in a Semi-Colonial Passerine: The Jackdaw Corvus monedula". Journal of Avian Biology. 31 (2): 177–182. doi:10.1034/j.1600-048X.2000.310209.x. JSTOR   3676991.
  57. 1 2 3 4 5 Cramp, p. 128.
  58. ↑ Leonardi, Giovanni (1999). "Cooperative Hunting of Jackdaws by the Lanner Falcon (Falco biarmicus)" (PDF). Journal of Raptor Research. 33 (2): 123–27.
  59. 1 2 Wilmore, S. Bruce (1977). Crows, Jays, Ravens and their Relatives. London, United Kingdom: David and Charles.
  60. 1 2 3 Lorenz, Konrad (1964) [1952]. "11. The Perennial Retainers". King Solomon's Ring: New Light on Animal Ways. Translated by Marjorie Kerr Wilson. London, United Kingdom: Methuen.
  61. ↑ Cramp, p. 130.
  62. 1 2 3 4 Cramp, p. 131.
  63. 1 2 Emery, Nathan J.; Seed, Amanda M.; von Bayern, Auguste M.P.; Clayton, Nicola S. (29 April 2007). "Cognitive Adaptations of Social Bonding in Birds". Philosophical Transactions of the Royal Society B . 362 (1480): 489–505. doi:10.1098/rstb.2006.1991. PMC   2346513 . PMID   17255008.
  64. ↑ The Poetical Works of William Cowper. Vol. 2. London, United Kingdom: William Pickering. 1853. p. 336.
  65. ↑ Greenoak, F. (1979). All the Birds of the Air; the Names, Lore and Literature of British Birds. London, United Kingdom: Book Club Associates. ISBN   978-0-233-97037-0.
  66. ↑ Koning, F. J.; Koning, H. J.; Baeyens, G. (2009). "Long-Term Study on Interactions between Tawny Owls (Strix aluco), Jackdaws (Corvus monedula) and Northern Goshawks (Accipiter gentilis)". Ardea. 97 (4): 453–456. doi: 10.5253/078.097.0408 . S2CID   84634921.
  67. 1 2 Johnsson, Kristina (1994). "Colonial Breeding and Nest Predation in the Jackdaw Corvus monedula using old Black Woodpecker Dryocopus martius Holes". Ibis. 136 (3): 313–17. doi:10.1111/j.1474-919X.1994.tb01100.x.
  68. 1 2 3 Coward, T. A. (1920). The Birds of the British Isles and their Eggs. London: Frederick Warne & Co Ltd. pp.  28–30.
  69. ↑ Goodwin, p. 47
  70. 1 2 3 Cramp, p. 135.
  71. ↑ Tryjanowski, Piotr; Kuczynski, Lechosław; Antczak, Marcin; Skoracki, Maciej; Hromada, Martin (2001). "Within-clutch Repeatability of Egg Dimensions in the Jackdaw Corvus monedula: a Study Based on a Museum Collection". Biologia. 56 (2): 211–15.
  72. ↑ Gibbons, David Wingfield (June 1987). "Hatching Asynchrony Reduces Parental Investment in the Jackdaw". Journal of Animal Ecology. 53 (2): 403–14. doi:10.2307/5056. JSTOR   5056.
  73. ↑ Arias-de-Reyna, Luis (1998). "Coevolution of the Great Spotted Cuckoo and its Hosts". In Rothstein, Stephen I.; Robinson, Scott Kuehner (eds.). Parasitic Birds and their Hosts: Studies in Coevolution. Oxford, United Kingdom: Oxford University Press. pp. 129–42. ISBN   978-0-19-509976-8.
  74. ↑ Charter, M.; Bouskila, A.; Aviel, S.; Leshem, Y. (2005). "First Record of Eurasian Jackdaw (Corvus monedula) Parasitism by the Great Spotted Cuckoo (Clamator glandarius) in Israel". The Wilson Bulletin. 117 (2): 201–204. doi:10.1676/04-065. JSTOR   20060085. S2CID   85885434.
  75. ↑ Cramp, p. 136.
  76. 1 2 3 Lockie, J. D. (November 1956). "The Food and Feeding Behaviour of the Jackdaw, Rook and Carrion Crow". The Journal of Animal Ecology. 25 (2): 421–28. doi:10.2307/1935. JSTOR   1935.
  77. ↑ Kulemeyer, Christoph; Asbahr, Kolja; Gunz, Philipp; Frahnert, Sylke; Bairlein, Franz (2009). "Functional Morphology and Integration of Corvid Skulls – a 3D Geometric Morphometric Approach". Frontiers in Zoology. 6 (2): 2. doi: 10.1186/1742-9994-6-2 . PMC   2651141 . PMID   19128499.
  78. 1 2 3 Cramp, p. 125.
  79. ↑ Mikula P. (2013). "Pozorované útoky kavky tmavej (Corvus monedula) na netopiere (Chiroptera) v Bardejove, severovýchodné Slovensko" [Western Jackdaw (Corvus monedula) attacking bats (Chiroptera): observations from Bardejov, northeastern Slovakia](PDF). Sylvia. 49: 157–159. Archived from the original (PDF) on 2016-03-09.
  80. 1 2 Hadjisterkotis, E. (2003). "The Effect of Corvid Shooting on the Populations of Owls, Kestrels and Cuckoos in Cyprus, with Notes on Corvid Diet". Zeitschrift für Jagdwissenschaft. 49 (1): 50–60. doi:10.1007/BF02192013. S2CID   42994894.
  81. ↑ Soler, Juan José; Soler, Manuel; Martínez, Juan Gabriel (1993). "Grit Ingestion and Cereal Consumption in Five Corvid Species" (PDF). Ardea. 81 (2): 143–49. Archived from the original (PDF) on 2011-10-03.
  82. ↑ Cramp, p. 127.
  83. ↑ Praus, Libor; Weidinger, Karel (2010). "Predators and Nest Success of Sky Larks Alauda arvensis in Large Arable Fields in the Czech Republic" (PDF). Bird Study. 57 (4): 525–30. doi:10.1080/00063657.2010.506208. S2CID   84660427. Archived from the original (PDF) on 2011-10-05. Retrieved 2011-07-04.
  84. ↑ Hetmański, Tomasz; Barkowska, Miłosława (2007). "Density and Age of Breeding Pairs Influence Feral Pigeon, Columba livia Reproduction" (PDF). Folia Zoologica. 56 (1): 71–83. Archived from the original (PDF) on 2011-10-07. Retrieved 2011-08-03.
  85. ↑ Baglione, Vittorio; Canestrari, Daniela (2009). "Kleptoparasitism and Temporal Segregation of Sympatric Corvids Foraging in a Refuse Dump". The Auk. 126 (3): 566–78. doi: 10.1525/auk.2009.08146 . S2CID   86160426.
  86. ↑ Puzović, S. (2008). "Nest Occupation and Prey Grabbing by Saker Falcon (Falco cherrug) on Power Lines in the Province of Vojvodina (Serbia)" (PDF). Archives of Biological Sciences. 60 (2): 271–77. doi: 10.2298/abs0802271p .
  87. ↑ de Kort, Selvino R.; Emery, Nathan J.; Clayton, Nicola S. (2006). "Food Sharing in Jackdaws, Corvus monedula: What, Why and with Whom?". Animal Behaviour. 72 (2): 297–304. doi:10.1016/j.anbehav.2005.10.016. S2CID   53160564.
  88. ↑ von Bayern, A. M. P.; de Kort, S. R.; Clayton, N. S.; Emery, N. J. Frequent food- and Object-sharing during Jackdaw (Corvus monedula) Socialisation. Ethological Conference, Budapest, Hungary, 2005.
  89. ↑ Hudson, S. J.; Sobo, A. O.; Russel, K.; Lightfoot, N. F. (1990). "Jackdaws as potential source of milk-borne Campylobacter jejuni infection". The Lancet. 335 (8698): 1160. doi:10.1016/0140-6736(90)91162-4. PMID   1971891. S2CID   41216961.
  90. ↑ "The thieving magpie (and jackdaw)". The Lancet. 337 (8745): 844. 1991. doi:10.1016/0140-6736(91)92541-9. S2CID   54248330.
  91. ↑ Johne, R.; Wittig, W.; Fernandez-De-Luco, D.; Hofle, U.; Muller, H. (2006). "Characterization of Two Novel Polyomaviruses of Birds by Using Multiply Primed Rolling-Circle Amplification of Their Genomes". Journal of Virology. 80 (7): 3523–3531. doi:10.1128/JVI.80.7.3523-3531.2006. PMC   1440385 . PMID   16537620.
  92. ↑ Klaasen, H. L.; Koopman, J. P.; Van Den Brink, M. E.; Bakker, M. H.; Poelma, F. G.; Beynen, A. C. (1993). "Intestinal, segmented, filamentous bacteria in a wide range of vertebrate species". Laboratory Animals. 27 (2): 141–50. doi: 10.1258/002367793780810441 . PMID   8501895. S2CID   39632270.
  93. ↑ Marzluff, John M.; Angell, Tony (2005). "Cultural Connections". In the Company of Crows and Ravens. New Haven, Connecticut & London, United Kingdom: Yale University Press. ISBN   978-0-300-10076-1.
  94. ↑ Lovegrove, Roger (2007). Silent Fields: The Long Decline of a Nation's Wildlife. Oxford, United Kingdom: Oxford University Press. pp. 79–81, 162–63. ISBN   978-0-19-852071-9.
  95. 1 2 Hereth, Antonia (2003). Das Bild der Rabenvögel (Corvidae) in der heutigen Gesellschaft (in German). Justus – Liebig – Universität Gießen. pp. 10, 25.
  96. ↑ "Trapping Pest Birds". BASC: The British Association for Shooting and Conservation. Archived from the original on 10 August 2011. Retrieved 19 April 2012.
  97. ↑ "Aesop's Fables: The Vain Jackdaw". BBC School Radio . Retrieved 5 June 2012.
  98. ↑ Collected Works of Erasmus: Adages: Ivi1 to Ix100. Translated by Roger A. Mynors. University of Toronto Press. 1989. p. 314.
  99. 1 2 Thompson, D'Arcy Wentworth (1895). A Glossary of Greek Birds. Oxford, United Kingdom. p.  89.{{cite book}}: CS1 maint: location missing publisher (link)
  100. ↑ Graves, Robert (1955). "Scylla and Nisus". Greek Myths. London, United Kingdom: Penguin. p.  308. ISBN   978-0-14-001026-8.
  101. 1 2 de Vries, Ad (1976). Dictionary of Symbols and Imagery. Amsterdam, Netherlands: North-Holland Publishing Company. p.  275. ISBN   978-0-7204-8021-4.
  102. ↑ Opie, Iona; Tatem, Moira, eds. (1996). "Jackdaw" . A Dictionary of Superstitions. Oxford, United Kingdom: Oxford University Press and Fatih University. ISBN   9780192829160 . Retrieved 19 December 2008.
  103. ↑ Owen, Elias (1896). Welsh Folk-lore: a Collection of the Folk-tales and Legends of North Wales. Kessinger Publishing. p. 324. ISBN   978-0-88305-487-1.
  104. ↑ Porter, Enid (1969). Cambridgeshire Customs and Folklore: with Fenland Material Provided. Taylor & Francis. pp. 38–39. ISBN   978-0-7100-6201-7.
  105. ↑ Magocsi, Paul Robert (1983). Galicia: a Historical Survey and Bibliographic Guide. Toronto, Ontario: University of Toronto Press. p. xv. ISBN   978-0-8020-2482-4.
  106. ↑ Gray, Richard T. (2005). Franz Kafka Encyclopedia. Westport, Connecticut: Greenwood Publishing Group. p. 12. ISBN   978-0-313-30375-3.

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