Editing Red grouse

{{redirect-distinguish|Moorfowl|Moorcock (disambiguation){{!}}Moorcock|Moorhen}}
{{short description|Subspecies of bird}}
{{subspeciesbox
| name = Red grouse
| image = 2014-04-21 Lagopus lagopus scotica, Hawsen Burn 1.jpg
| image2 = Red Grouse (Lagopus lagopus) (W1CDR0001407 BD28).ogg
| image2_caption = Song and calls recorded in the UK
| genus = Lagopus
| species = lagopus
| species_link = Willow ptarmigan
| subspecies = scotica
| authority = ([[John Latham (ornithologist)|Latham]], 1787)
| synonyms =
''Lagopus lagopus scoticus''
}}

The '''red grouse''' ('''''Lagopus lagopus scotica''''') is a medium-sized bird of the [[grouse]] family which is found in [[Calluna|heather]] [[moorland]] in [[Great Britain]] and [[Ireland]]. It is usually classified as a subspecies of the [[willow ptarmigan]] but is sometimes considered to be a separate species, ''Lagopus scoticus''. It is also known as the '''moorcock''', '''moorfowl''' or '''moorbird'''. ''Lagopus'' is derived from [[Ancient Greek]] {{lang|grc-Latn|lagos}} ({{lang|grc|λαγος}}), meaning "[[hare]]", + {{lang|grc-Latn|pous}} ({{lang|grc|πους}}), "foot", in reference to the feathered feet and toes typical of this cold-adapted genus, and ''scoticus'' is "of Scotland".<ref name= job90>{{cite book | last= Jobling | first= James A | year= 2010| title= The Helm Dictionary of Scientific Bird Names | url= https://archive.org/details/Helm_Dictionary_of_Scientific_Bird_Names_by_James_A._Jobling | publisher = Christopher Helm | location = London | isbn = 978-1-4081-2501-4 |pages =[https://archive.org/details/Helm_Dictionary_of_Scientific_Bird_Names_by_James_A._Jobling/page/n217 217], 351}}</ref>

The red grouse is the logo of [[The Famous Grouse]] [[whisky]] and an animated bird is a character in a series of its adverts. The red grouse is also the emblem of the journal ''[[British Birds (magazine)|British Birds]]''.

[[File:Lagopede d'Ecosse MHNT.jpg|thumb|Red grouse eggs]]

==Description==
The red grouse is differentiated from the [[willow ptarmigan]] and [[rock ptarmigan]] by its plumage being reddish brown, and not having a white winter plumage. The tail is black and the legs are white. There are white stripes on the underwing and red combs over the eye. Females are less reddish than the males and have less conspicuous combs. Young birds are duller and lack the red combs.

Birds in Ireland are sometimes thought to belong to a separate subspecies ''L. l. hibernica''. They are slightly paler than those in Britain and the females have yellower plumage with more finely barred underparts. This may be an adaptation to [[camouflage]] them in moorland with higher grass and sedge content and less heather.

It is identified by its {{'}}''chut!chut!chut!chut!chut!chuttt....''{{'}} call, or the {{'}}''Goback, goback, goback''{{'}} vocalisation. The wings make a whirring sound when the bird is disturbed from a resting place.

Grouse populations display periodic cycling, where the population builds up to very high densities only to crash a few years later, and then recover. The main driver of this cyclic pattern is thought to be the parasitic [[nematode]] worm ''[[Trichostrongylus tenuis]]''.

However, in his book,<ref>Wynne Edwards, V. C. ''Evolution through Group Selection'' 1986 Blackwell Scientific Publications Oxford</ref> [[V. C. Wynne-Edwards]] suggests that the primary reason for mortality in grouse population is [[homeostasis]] depending largely on food availability and that the 'Grouse disease', due to the parasitic worm ''Trichostrongylus tenuis'' is a mistaken diagnosis of the after effects of social exclusion.

==Distribution and habitat==
The red grouse is [[endemism in birds|endemic]] to the [[British Isles]]; it has developed in isolation from other subspecies of the willow ptarmigan which are widespread in northern parts of [[Eurasia]] and North America.

It is found across most parts of [[Scotland]], including [[Orkney]], [[Shetland]] and most of the [[Outer Hebrides]]. They are only absent from urban areas, such as in the [[Central Belt]].{{Citation needed|date=May 2021}}

In Wales there are strong populations in places but their range has retracted. They are now largely absent from the far south, their main strongholds being [[Snowdonia]], the [[Brecon Beacons]] and the [[Cambrian Mountains]].{{Citation needed|date=May 2021}}

In [[England]] it is mainly found in the north – places such as the [[Lake District]], [[Northumberland]], [[County Durham]], much of [[Yorkshire]], the [[Pennines]] and the [[Peak District]], as far south as the [[Staffordshire Moorlands]].{{Citation needed|date=May 2021}} There is an isolated introduced population on [[Dartmoor]], and overspill Welsh birds visit the [[Shropshire Hills]] such as [[Long Mynd]], where they breed. The Exmoor population would now appear to be extinct, with the last birds sighted as recently as 2005. An introduced population in [[Suffolk]] died out by the early 20th century, though a population on [[Cannock Chase]] in [[Staffordshire]] lasted longer.{{Citation needed|date=May 2021}}

In Ireland it is found locally in most parts of the country: it is commonest in [[County Mayo]], where the population is increasing,<ref>''Irish Birds'' Vol. 8 (2005-6) p.258</ref> and on the [[County Antrim]] plateau, with other healthy populations in the [[Slieve Bloom Mountains]] and the [[Knockmealdown Mountains]];<ref>''Irish Birds'' Vol.9 (2009) p.74</ref> There is  still a small
population  in south [[County Dublin]].

The small population in the [[Isle of Man]] is mostly concentrated in the southern hills but conservation work is ongoing throughout the uplands to ensure the species' continued viability.{{Citation needed|date=May 2021}}

Its typical habitat is upland heather moors away from trees. It can also be found in some low-lying bogs and birds may visit farmland during hard weather.{{Citation needed|date=May 2021}}

The British population is estimated at 250,000 pairs with around 1–5,000 pairs in Ireland. Numbers have declined in recent years and birds are now absent in areas where they were once common. Reasons for the decline include loss of heather due to [[overgrazing]], creation of new [[conifer]] [[plantation]]s and a decline in the number of upland gamekeepers. Some predators such as the [[hen harrier]] feed on grouse and there is ongoing controversy as to what effect these have on grouse numbers.{{Citation needed|date=May 2021}}

Red grouse have been introduced to the [[Hautes Fagnes]] region of [[Belgium]] but the population there died out in the early 1970s.{{Citation needed|date=May 2021}}

==Behaviour==

===Diet===
The red grouse is herbivorous and feeds mainly on the shoots, seeds and flowers of heather. It will also feed on berries, [[cereal]] crops and sometimes insects.

===Breeding===
The birds begin to form pairs during the autumn and males become increasingly territorial as winter progresses. The nest is a shallow scrape up to {{cvt|20|cm}} across which is lined with vegetation. About six to nine eggs are laid, mainly during April and May. They are oval, glossy and pale yellow with dark brown blotches. The eggs are incubated for 19 to 25 days, the chicks can fly after 12 to 13 days after hatching and are fully grown after 30 to 35 days.

==Conservation==
[[Member States of the European Union]] are obliged by virtue of Council Directive 2009/147/EC<ref>Codified version, replacing Council Directive 79/409/EC</ref> on the conservation of wild birds (popularly called the [[Birds Directive]]) to take the requisite measures for the protection of the red grouse; but as it is a species to which Annex II of the Directive applies, Article 7 permits hunting under national law, provided population levels are not threatened as a result. In 2002, Ireland was found by the [[European Court of Justice]] to be in breach of its obligations under an  earlier  Birds Directive to protect the red grouse, in that it had allowed a crucial breeding ground to become degraded through overgrazing by [[sheep]].<ref>Case C-117/00 ''Commission v Ireland'' Judgement of 13 June 2002</ref> Conservation measures taken on foot of the judgment have seen the population in the area double from c.400 to 800.

==As a game bird==
{{see also|Driven grouse shooting}}
[[Image:Heather burning.jpg|250px|right|thumb|Controlled burning of heather, on a Derbyshire grouse moor]]
The red grouse is considered a game bird and is shot in large numbers during the shooting season which traditionally starts on August 12, known as the [[Glorious Twelfth]]. There is a keen competition among some London restaurants to serve freshly killed grouse on August 12, with the birds being flown from the moors and cooked within hours.

[[File:Grouse grit.jpg|thumb|left|Grouse grit]]
Shooting can take the form of 'walked up' (where shooters walk across the moor to flush grouse and take a shot) or '[[Driven grouse shooting|driven]]' (where grouse are driven, often in large numbers, by 'beaters' towards the guns who are hiding behind a line of 'butts'). Many moors are managed to increase the density of grouse. Areas of heather are subjected to controlled burning; this allows fresh young shoots to regenerate, which are favoured by the grouse. Extensive predator control is a feature of grouse moor management: foxes, stoats and crows are usually heavily controlled on grouse moors. The extent to which it occurs on grouse moors is hotly contested between conservation groups and shooting interests, and the subject generates a lot of media attention in relation to grouse moors and shooting.

In recent decades the practice of using medicated grit and direct dosing of birds against an endoparasite, the strongyle worm or threadworm (''[[Trichostrongylus tenuis]]''), has become part of the management regime on many moors.

== As food ==
The flavour of grouse, like most game birds, develops if the bird is hung for a few days after shooting and before eating. [[Roast]]ing is the most common way to cook a grouse.

''[[The Cookery Book of Lady Clark of Tillypronie]]'' (1909) has 11 recipes for using grouse. The recipe "To cook old birds" runs as follows:<ref name=Tillypronie>{{cite book | title=The Cookery Book of Lady Clark of Tillypronie | url=https://archive.org/details/b21530130 | publisher=Constable and Co. | year=1909| editor=Frere, Catherine Frances|pages=[https://archive.org/details/b21530130/page/142 142]–143}}</ref>
{{quote|Old grouse are not fit for cooking till the feathers pull very loosely from the "apron". When "high", put a piece of bread inside them while roasting; take out the bread before dishing, and throw it away. A good gravy should be served with them in a boat, none in the dish, but put the birds on a toast when bread is plentiful.|Lady Clark of Tillypronie<ref name=Tillypronie/>}}

==Scientific study==
Because of their economic and social importance and some interesting aspects of their biology, red grouse have been widely studied. They were the subject of some of the earliest studies of population biology in birds, as detailed in'' The Grouse in Health and in Disease'' by [[Simon Fraser, 14th Lord Lovat|Lord Lovat]] in 1911. Since the mid-20th century they have been subject to ongoing study by many organisations and individuals. Much work has been conducted by the Institute of Terrestrial Ecology in the eastern [[Cairngorms]], and by the [[Game & Wildlife Conservation Trust]] in the Central Highlands. There are a wide range of research activities still going on today and a wealth of published literature exists on all aspects of grouse biology.

==Parasites and viruses==

The red grouse may be infected by parasites and viruses which severely affect populations. [[Strongylosis]] or 'grouse disease' is caused by the [[strongyle worm]], which induces damage and internal bleeding after burrowing into the [[caecum]]. This [[endoparasite]] is often eaten with the tops of young [[Calluna|heather]] shoots and can lead to mortality and poor condition, including a decrease in the bird's ability to control the scent it emits.

First diagnosed in the UK in 2010, respiratory [[cryptosporidiosis]], caused by ''Cryptosporidium baileyi'', is present in approximately half the grouse moors in northern England, where it reduces natural survival and productivity of red grouse. <ref>{{cite journal |author1= Baines, D. |author2= Allinsom, H. | author3= Duff, J.P. | author4= Fuller, H. | author5= Newborn, D. |author6= Richardson, M. | year=2018| title= Lethal and sub‐lethal impacts of respiratory cryptosporidiosis on Red Grouse, a wild gamebird of economic importance | journal=Ibis| volume=160| pages= 882–891| doi=10.1111/ibi.12573 | issue=4}}</ref>

[[Louping ill virus]] is a [[flavivirus]] (RNA virus), also known as sheep encephalomyelitis virus. Flaviviruses are transmitted by arthropods, and louping ill virus is transmitted by ticks. In red grouse, this virus can cause mortality as high as 78%.<ref name="Gilbert2004" /> The main tick vector is the sheep tick ''[[Ixodes ricinus]]''. Although traditionally tick-borne diseases are thought to be caused when the parasite bites its host, it has been shown that red grouse chicks can be affected when they eat ticks with which they come into contact.<ref name="Gilbert2004">{{Cite journal | last1 = Gilbert | first1 = L. | last2 = Jones | first2 = L. D. | last3 = Laurenson | first3 = M. K. | last4 = Gould | first4 = E. A. | last5 = Reid | first5 = H. W. | last6 = Hudson | first6 = P. J. | doi = 10.1098/rsbl.2003.0147 | title = Ticks need not bite their red grouse hosts to infect them with louping ill virus | journal = Proceedings of the Royal Society B: Biological Sciences | volume = 271 | issue = Suppl 4 | pages = S202–S205 | year = 2004 | pmid =  15252984| pmc = 1810039}}</ref> This virus may be a significant factor in red grouse populations.

==References==

{{Reflist}}

==External links==
* [http://www.rspb.org.uk/birds/guide/r/redgrouse/index.asp RSPB Red Grouse page]
* [http://www.gwct.org.uk/research/species/birds/red-grouse/ GWCT Red Grouse page]

{{Commons|Lagopus lagopus scotica|Red Grouse}}
{{English Game}}
{{Taxonbar|from=Q1077472}}

[[Category:Lagopus|red grouse]]
[[Category:Grouse|red grouse]]
[[Category:Birds of Europe]]
[[Category:Birds described in 1787|red grouse]]
[[Category:Taxa named by John Latham (ornithologist)|red grouse]]
[[Category:Subspecies]]

[[pl:Pardwa mszarna#Systematyka]]<!-- no seperate article for ''scotica'' yet -->