The snow partridge (''Lerwa lerwa'') is a
gamebird
Galliformes is an order of heavy-bodied ground-feeding birds that includes turkeys, chickens, quail, and other landfowl. Gallinaceous birds, as they are called, are important in their ecosystems as seed dispersers and predators, and are often ...
in the pheasant family
Phasianidae
The Phasianidae are a family (biology), family of heavy, ground-living birds, which includes pheasants, partridges, junglefowl, chickens, Turkey bird, turkeys, Old World quail, and peafowl. The family includes many of the most popular Game (hunti ...
found widely distributed across the high-altitude
Himalaya
The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over 100 ...
n regions of
India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
,
Pakistan
Pakistan ( ur, ), officially the Islamic Republic of Pakistan ( ur, , label=none), is a country in South Asia. It is the world's List of countries and dependencies by population, fifth-most populous country, with a population of almost 24 ...
,
Nepal
Nepal (; ne, नेपाल ), formerly the Federal Democratic Republic of Nepal ( ne,
सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल ), is a landlocked country in South Asia. It is mai ...
and
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
. It is the
only species within its genus, and is thought to be the most
basal member of the "erectile clade" of the subfamily
Phasianinae
The Phasianinae (Thomas Horsfield, Horsfield, 1821) are a subfamily (biology), subfamily of the pheasant family (Phasianidae) of landfowl, the order (biology), order Galliformes. The subfamily includes true pheasants, tragopans, grouse, Turkey ( ...
. The species is found in
alpine
Alpine may refer to any mountainous region. It may also refer to:
Places Europe
* Alps, a European mountain range
** Alpine states, which overlap with the European range
Australia
* Alpine, New South Wales, a Northern Village
* Alpine National Pa ...
pastures and open hillside above the
treeline
The tree line is the edge of the habitat at which trees are capable of growing. It is found at high elevations and high latitudes. Beyond the tree line, trees cannot tolerate the environmental conditions (usually cold temperatures, extreme snowp ...
but not in as bare rocky terrain as the
Himalayan snowcock
The Himalayan snowcock (''Tetraogallus himalayensis'') is a snowcock in the pheasant family Phasianidae found across the Himalayan ranges and parts of the adjoining Pamir range of Asia. It is found on alpine pastures and on steep rocky cliffs wh ...
and is not as wary as that species. Males and females look similar in
plumage
Plumage ( "feather") is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, ...
but males have a spur on their
tarsus.
Description
![LerwaFBI](https://upload.wikimedia.org/wikipedia/commons/f/f3/LerwaFBI.jpg)
This partridge appears grey above and chestnut below with bright red
bill
Bill(s) may refer to:
Common meanings
* Banknote, paper cash (especially in the United States)
* Bill (law), a proposed law put before a legislature
* Invoice, commercial document issued by a seller to a buyer
* Bill, a bird or animal's beak
Plac ...
and legs and the upperparts finely barred in black and white. In flight the pattern of dark brown
primaries
Primary elections, or direct primary are a voting process by which voters can indicate their preference for their party's candidate, or a candidate in general, in an upcoming general election, local election, or by-election. Depending on the c ...
and secondaries with a narrow trailing white margin make them somewhat like the much larger
Tibetan snowcock
The Tibetan snowcock (''Tetraogallus tibetanus'') is a bird in the pheasant family Phasianidae of the order Galliformes, gallinaceous birds. This species is found in high-altitude regions of the Western Himalayas and the Tibetan Plateau, where i ...
. The 14-feathered tail is dark and barred in white. There is variation in the shade and some birds have a nearly black crown.
[ The primaries and secondaries are brown and the breast is deep chestnut. The abdomen has more white and the lower flanks and feathers around the vent are barred brown and white. The under-tail coverts are chestnut with black shaft streaks and white tips. Young birds have the lower parts mottled and the barring less distinct. The tarsus is feathered on the front of the leg half-way to the toes.]
It measures 38–40 cm in length. Females weigh 450–580 g; males, 550–700 g. Sexes are similar in plumage, female lacks spurs on the tarsus while the male has a blunt spur and sometimes a second incipient spur. Downy chicks have a resemblance to the chicks of the blood pheasant
The blood pheasant (''Ithaginis cruentus''), also known as blood partridge, is the only species in genus ''Ithaginis'' of the pheasant family. It is a relatively small, short-tailed pheasant that is widespread and is fairly common in eastern Him ...
.[ Chicks are born with the tarsi feathered and the nostril opening is covered by feathers.]
Taxonomy and systematics
This species was first described by Brian Houghton Hodgson
Brian Houghton Hodgson (1 February 1800 or more likely 1801 – 23 May 1894) was a pioneer naturalist and ethnologist working in India and Nepal where he was a British Resident. He described numerous species of birds and mammals from the Himala ...
in 1833 and given the genus name ''Lerwa'' based on the Bhutia
The Bhutia (; sip, Drenjongpa/Drenjop; ; "inhabitants of Sikkim".) are a community of Sikkimese people living in the state of Sikkim in northeastern India, who speak Drenjongke or Sikkimese, a Tibetic language fairly mutually intelligible w ...
name for it in Nepal. Hodgson initially placed it in the genus ''Perdix'' calling it ''Perdix lerwa''. A subspecies, ''L. l. major'' was described by Richard Meinertzhagen
Colonel Richard Meinertzhagen, CBE, DSO (3 March 1878 – 17 June 1967) was a British soldier, intelligence officer, and ornithologist. He had a decorated military career spanning Africa and the Middle East. He was credited with creating and e ...
from Szechuan while ''L. l. callipygia'' from south Kansu was noted by Stegmann in 1938, but these are not usually recognized. The species has been retained in this monotypic genus due to various peculiarities including the tarsus feathering and the lack of clear sexual dimorphism in plumage.[ A species of bird louse, ''Chelopistes lervicola'' has been described as an ectoparasite of this species, and other species in this louse genus are known to parasitize the Cracidae, Meleagrididae and Odontophorinae of the New World.
]
Distribution and status
Snow partridge is found in the Himalayas
The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over 100 ...
from Pakistan
Pakistan ( ur, ), officially the Islamic Republic of Pakistan ( ur, , label=none), is a country in South Asia. It is the world's List of countries and dependencies by population, fifth-most populous country, with a population of almost 24 ...
to Arunachal Pradesh
Arunachal Pradesh (, ) is a state in Northeastern India. It was formed from the erstwhile North-East Frontier Agency (NEFA) region, and became a state on 20 February 1987. It borders the states of Assam and Nagaland to the south. It shares int ...
along the higher ranges, mainly 3000 to 5000 m (rarely below 2000 m) altitude. It is found above the tree line but not on as bare and stony terrain as the snowcocks. Although said to be found in Afghanistan
Afghanistan, officially the Islamic Emirate of Afghanistan,; prs, امارت اسلامی افغانستان is a landlocked country located at the crossroads of Central Asia and South Asia. Referred to as the Heart of Asia, it is bordere ...
, there is no evidence. The species is found over a large area is generally considered to be of low conservation concern. It is hunted to some extent, due to its habit of being more approachable than snowcock and has declined in population in some areas.
The usual habitat is alpine pastures, open grassy hillsides with grass, lichen
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.[moss
Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) '' sensu stricto''. Bryophyta (''sensu lato'', Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and hor ...]
, fern
A fern (Polypodiopsida or Polypodiophyta ) is a member of a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers. The polypodiophytes include all living pteridophytes except t ...
s and rhododendron
''Rhododendron'' (; from Ancient Greek ''rhódon'' "rose" and ''déndron'' "tree") is a very large genus of about 1,024 species of woody plants in the heath family (Ericaceae). They can be either evergreen or deciduous. Most species are nati ...
s. Is found among small snow-patches but not in as stony or bare ground as the snowcock. The birds however are very local in their distribution.
Behaviour and ecology
The snow partridge is found is small groups, usually about 6 to 8 but up to 30 during the non-breeding season. When flushed, they usually fly up before scattering away with noisy wing beats. The flight is rapid and stirring. It has a habit of sunning itself on rocks during the midday.[ The call in the breeding season is said to resemble that of the ]grey francolin
The grey francolin (''Ortygornis pondicerianus''), also known as "manu moa" or "chicken bird", is a species of francolin found in the plains and drier parts of the Indian subcontinent and Iran. This species was formerly also called the grey partr ...
of the plains.[ It has been compared in habit to that of the ptarmigan. It is said to feed on mosses, lichens, berries, and the shoots of plants. It also swallows grit to aid digestion.]
The breeding season is May to July. The males are believed to be monogynous. The nest is a scrape on a hill-side under some sheltering rock, either scratched out by themselves or already available, and usually hidden with vegetation. The nest is sometimes lined with moss but well concealed although given away by the male. About 3 to 5 eggs, pale yellow in color and slightly glossy with reddish-brown markings on the rounded end, are laid, and the female incubates while the male stands sentinel. Parent birds may use distraction display
Distraction displays, also known as diversionary displays, or paratrepsis are anti-predator behaviors used to attract the attention of an enemy away from something, typically the nest or young, that is being protected by a parent. Distraction disp ...
s to draw the attention of predators. They call in a comparatively softer lower note to the young, which respond with chicken-like ''cheep'' calls.
Apart from ''Chelopistes lervicola'' described as an ectoparasite of this species, an Argasid tick ''Argas himalayensis'' has been noted.
References
External links
Photos, videos
Calls
{{Taxonbar, from=Q833453
snow partridge
The snow partridge (''Lerwa lerwa'') is a gamebird in the pheasant family Phasianidae found widely distributed across the high-altitude Himalayan regions of India, Pakistan, Nepal and China. It is the only species within its genus, and is thoug ...
snow partridge
The snow partridge (''Lerwa lerwa'') is a gamebird in the pheasant family Phasianidae found widely distributed across the high-altitude Himalayan regions of India, Pakistan, Nepal and China. It is the only species within its genus, and is thoug ...
Birds of Afghanistan
Birds of the Himalayas
Birds of North India
Birds of Central China
Birds of Tibet
snow partridge
The snow partridge (''Lerwa lerwa'') is a gamebird in the pheasant family Phasianidae found widely distributed across the high-altitude Himalayan regions of India, Pakistan, Nepal and China. It is the only species within its genus, and is thoug ...