Sri Lanka blue magpie | |
---|---|
At Sinharaja Forest Reserve, Sri Lanka | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Passeriformes |
Family: | Corvidae |
Genus: | Urocissa |
Species: | U. ornata |
Binomial name | |
Urocissa ornata (Wagler, 1829) | |
Distribution map for Sri Lanka Blue Magpie [1] |
The Sri Lanka blue magpie or Ceylon magpie (Urocissa ornata) is a brightly coloured member of the family Corvidae, [2] found exclusively in Sri Lanka. [3] This species is adapted to hunting in the dense canopy, where it is highly active and nimble. [4] Its flight is rather weak, though, and is rarely used to cover great distances. [4] In spite of the Sri Lanka blue magpie's ability to adapt to the presence of humans, [5] it is classified as vulnerable to extinction [1] due to the fragmentation and destruction of its habitat of dense primary forest in the wet zone of southern Sri Lanka. [3]
The Sri Lanka blue magpie measures 42–47 cm in length, [3] and is larger than a mynah, but smaller than a crow, [4] with a sturdy bill. [6] Its plumage is bright blue, with a reddish-brown or chestnut head, neck, and wing. The blue tail is long and graduated, with a white tip. [3] The bill, legs, feet, and featherless eye ring of this species are all vibrant red. [3] Both the male and female of the species share this description. [4] The juvenile of this species has a plumage similar to that of an adult, but overall duller, with a brown eye ring and a greyish hue to its blue feathers, especially on its underside. [3] Moulting season for Sri Lanka blue magpies is from August to November. [4]
The Sri Lanka blue magpie is a member of the order Passeriformes, in the family Corvidae. [2]
This species belongs to Urocissa , a genus of Southeast Asian magpies, [7] of which there are 5 known species total. [8] They share a recent common ancestor with another genus of Asian magpies, Cissa. [7] Both Urocissa and Cissa are genera of the Oriental region, where the diversity of corvid species originated. [7] They share a distant common ancestor with new world jays and magpies. [7]
This species is endemic to Sri Lanka, where it is found in tall, undisturbed forest in the mountains, foothills, and adjoining lowlands of the wet zone. [3] It is found from elevations of below 150 to 2150 m. It is not often seen in disturbed habitat such as gardens or plantations. [4]
Surveys conducted from 2004 to 2006 found individuals of this species in 38 separate forest patches contained within six forest complexes within its range in the wet zone of southern Sri Lanka. [3]
In spite of their avoidance of human-disturbed habitats, the Sri Lanka blue magpie tolerates and is even attracted to the presence of humans. [5] In response to low and moderate levels of recreational disturbance, and small to medium-sized groups of human visitors, numbers of Sri Lanka blue magpies increased, unlike other birds. [5] A group of individuals was often observed waiting near trails, expecting to be fed by groups of human visitors. [5]
The Sri Lanka blue magpie produces a great variety of vocalizations, including a jingle, a chink-chink, crakrakrakrak, and a whee-whee [3] .
Thirteen different common call types have been identified for the Sri Lanka blue magpie, including mimicry calls. [9] Individuals have been recorded using two raptor calls quite frequently, usually while mobbing a predator (the Accipiter high-pitched call and the mountain hawk-eagle (Nisaetus nipalensis kelaarti) call) [9] These raptor calls are mimicked by another species that occupies the same region, the greater racket-tailed drongo (Dicrurus paradiseus), implying that these imitated predator calls can act as alarm signals for multiple species. [9]
Sri Lanka blue magpies do not just imitate the calls of predators, however. They have been observed mimicking the calls and songs of other birds in their prolonged and elaborate subsong. [9]
These birds use their strong legs and feet to forage, and have been observed hanging upside down and holding down their prey with ease. [4]
Their diet is mainly carnivorous, featuring insects, frogs, and small lizards, but they have been known to consume fruit, as well, [4] and some observations suggest that they also prey on eggs or young of other bird species. [10] Sri Lanka blue magpies have been observed rubbing hairy caterpillars against mossy branches to remove irritating hairs prior to consuming them. [4]
Sri Lanka blue magpies are monogamous, use co-operative breeding to raise their young, [3] and can be seen in small flocks of up to seven birds, while each bird maintains a territory. [4]
The generation length of Sri Lanka blue magpies is 6.7 years. [1] Breeding season is from January through March, and three to five eggs, which are white covered with brown spots, are laid in a clutch. [4] Cup-shaped nests are built atop small, slender trees [10] and lined with soft materials like lichen. [4]
Both sexes build the nest and feed offspring, with only the female incubating them.
The Sri Lanka blue magpie is listed as vulnerable, due to the fragmentation and ongoing decline of the population. [3] Surveys performed in 2004-2006 estimate the population at 10,181-19,765 individuals, although their breeding strategy of monogamy and co-operative breeding has led to that estimate being reduced to 9,500-19,500 individuals total to reflect their effective population size. [3]
The main threat to the survival of the Sri Lanka blue magpie is habitat loss due to forest being cleared for agricultural land, mines, logging, and human settlement. [3] A moratorium on logging in wet zones in 1990, plus the legal protection of this species in Sri Lanka, have the potential to slow their population decline, but air pollution causing forest die-back and the use of biocides in the hill country continue to threaten the Sri Lanka blue magpie. [3]
One of the factors preventing the Sri Lanka blue magpie from moving into disturbed habitat has been suggested to be the presence of another bird, the Asian koel (Eudynamys scolopaceus), which is a brood parasite. [3]
In Sri Lanka, this bird is known as කැහිබෙල්ලා (kehibella) in Sinhala. [11] The blue magpie appears on a 10c Sri Lankan postal stamp, [12] which was in wide usage in the 1980s through 1990s.
Magpies are birds of the Corvidae family. Like other members of their family, they are widely considered to be intelligent creatures. The Eurasian magpie, for instance, is thought to rank among the world's most intelligent creatures and is one of the few nonmammalian species able to recognize itself in a mirror test. They are particularly well known for their songs and were once popular as cagebirds. In addition to other members of the genus Pica, corvids considered as magpies are in the genera Cissa, Urocissa, and Cyanopica.
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.
The Eurasian magpie or common magpie is a resident breeding bird throughout the northern part of the Eurasian continent. It is one of several birds in the crow family (corvids) designated magpies, and belongs to the Holarctic radiation of "monochrome" magpies. In Europe, "magpie" is used by English speakers as a synonym for the Eurasian magpie: the only other magpie in Europe is the Iberian magpie, which is limited to the Iberian Peninsula.
The Taiwan blue magpie, also called the Taiwan magpie, Formosan blue magpie, or the "long-tailed mountain lady", is a bird species in the crow family. It is endemic to Taiwan.
The red-billed blue magpie is a species of bird in the crow family, Corvidae. It is about the same size as the Eurasian magpie, but has a much longer tail, one of the longest of any corvid. It is 65–68 cm (25.5–27 in) long and weighs 196–232 g (6.9–8.2 oz).
Urocissa is a genus of birds in the Corvidae, a family that contains the crows, jays, and magpies.
Cissa is a genus of relatively short-tailed magpies, sometimes known as hunting cissas, that reside in the forests of tropical and subtropical southeast Asia and adjacent regions. The four species are quite similar with bright red bills, primarily green plumage, black mask, and rufous wings.
The Sri Lanka whistling thrush is a whistling thrush in the family Muscicapidae. It is a resident endemic bird in Sri Lanka.
The mountain hawk-eagle or Hodgson's hawk-eagle, is a large bird of prey native to Asia. The latter name is in reference to the naturalist, Brian Houghton Hodgson, who described the species after collecting one himself in the Himalayas. A less widely recognized common English name is the feather-toed eagle. Like all eagles, it is in the family Accipitridae. Its feathered tarsus marks this species as a member of the subfamily Aquilinae. It is a confirmed breeding species in the northern part of the Indian subcontinent, from India, Nepal through Bangladesh to Thailand, Taiwan, Vietnam and Japan, although its distribution could be wider still as breeding species. Like other Asian hawk-eagles, this species was earlier treated under the genera of Spizaetus but genetic studies have shown this group to be paraphyletic, resulting in the Old World members being placed in Nisaetus and separated from the New World species. As is typical of hawk-eagles, the mountain hawk-eagle is a forest dwelling opportunistic predator who readily varies its prey selection between birds, mammals and reptiles along with other vertebrates. Although classified currently as a least-concern species due its persistence over a rather wide distribution, this species is often quite rare and scarce and seems to be decreasing, especially in response to large-scale habitat degradation and deforestation.
The orange-billed babbler, also known as Ceylon rufous babbler or Sri Lankan rufous babbler, is a member of the family Leiothrichidae.
The ashy-headed laughingthrush is a member of the family Leiothrichidae. The laughingthrushes are a large family of Old World passerine birds characterised by soft fluffy plumage. These are birds of tropical areas, with the greatest variety in southeast Asia.
The brown-capped babbler is a member of the family Pellorneidae.
The dull-blue flycatcher is a small passerine bird in the flycatcher family, Muscicapidae. It was previously included in the genus Muscicapa.
Legge's flowerpecker or the white-throated flowerpecker, is a small passerine bird. It is an endemic resident breeder in Sri Lanka. It is named after the Australian ornithologist William Vincent Legge.
The Indochinese green magpie or yellow-breasted magpie, is a passerine bird of the crow family, Corvidae. It is native to mainland southeast Asia (Indochina) and adjacent China.
The Javan green magpie is a passerine bird in the crow family, Corvidae. This critically endangered species is endemic to montane forests on the Indonesian island of Java. It formerly included the Bornean green magpie as a subspecies, in which case the "combined" species was known as the short-tailed magpie.
The yellow-billed blue magpie or gold-billed magpie is a passerine bird in the crow and jay family, Corvidae. It forms a superspecies with the Taiwan blue magpie and the red-billed blue magpie. The species ranges across the northern parts of the Indian Subcontinent including the lower Himalayas, with a disjunct population in Vietnam.
Layard's palm squirrel or flame-striped jungle squirrel is a species of rodent in the family Sciuridae endemic to Sri Lanka. The validity of the subspecies F. l. dravidianus based on a single specimen from the southern tip of India has been questioned, and is probably a juvenile F. sublineatus. Known as මූකලන් ලේනා in Sinhala.
The Bornean green magpie is a passerine bird in the crow family, Corvidae. It is endemic to montane forests on the southeast Asian island of Borneo. It was formerly included as a subspecies of the Javan green magpie, but under the common name Short-tailed Green Magpie. Uniquely among the green magpies, the Bornean green magpie has whitish eyes.
The Asir magpie, also known as the Arabian magpie, is a highly endangered species of magpie endemic to Saudi Arabia. It is only found in the country's southwestern highlands, in the Asir Region. It occurs only in African juniper forest in well-vegetated wadis and valleys. It was formerly classified as a subspecies of the Eurasian magpie, and still is by many authorities. This species is highly threatened by habitat destruction, as its native forests are not regenerating. Tourism development and climate change are also posing a threat. Only 135 pairs are known to survive in the wild, and this number is declining.
Media related to Urocissa ornata at Wikimedia Commons