Siberian crane | |
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A captive individual in a zoo | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Gruiformes |
Family: | Gruidae |
Genus: | Leucogeranus Bonaparte, 1855 |
Species: | L. leucogeranus |
Binomial name | |
Leucogeranus leucogeranus (Pallas, 1773) | |
Migration routes, breeding and wintering sites | |
Synonyms | |
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The Siberian crane (Leucogeranus leucogeranus), also known as the Siberian white crane or the snow crane, is a bird of the family Gruidae, the cranes. They are distinctive among the cranes: adults are nearly all snowy white, except for their black primary feathers that are visible in flight, and with two breeding populations in the Arctic tundra of western and eastern Russia. The eastern populations migrate during winter to China, while the western population winters in Iran and (formerly) in Bharatpur, India.
Among the cranes, they make the longest distance migrations. Their populations, particularly those in the western range, have declined drastically in the 20th century due to hunting along their migration routes and habitat degradation. The world population was estimated in 2010 at about 3,200 birds, mostly belonging to the eastern population with about 95% of them wintering in the Poyang Lake basin in China, a habitat that may be altered by the Three Gorges Dam.[ needs update ]
The Siberian crane was formally described by Peter Simon Pallas in 1773 and given the binomial name Grus leucogeranus. [3] [4] The specific epithet is derived from the classical Greek words leukos for "white" and geranos for a "crane". [5] Ustad Mansur, a 17th-century court artist and singer of Jahangir, had illustrated a Siberian crane about 100 years earlier. [6] The genus Megalornis was used for the cranes by George Robert Gray and this species was included in it, while Richard Bowdler Sharpe suggested a separation from Grus and used the genus Sarcogeranus. [7] [8] [9] The Siberian crane lacks the complex tracheal coils found in most other cranes but shares this feature with the wattled crane. The unison call differed from that of most cranes and some authors suggested that the Siberian crane belonged in the genus Bugeranus along with the wattled crane. Comparisons of the DNA sequences of cytochrome-b however suggest that the Siberian crane is basal among the Gruinae and the wattled crane is retained as the sole species in the genus Bugeranus and placed as a sister to the Anthropoides cranes. [10] [11]
A molecular phylogenetic study published in 2010 found that the genus Grus, as then defined, was polyphyletic. [12] In the resulting rearrangement to create monophyletic genera, the Siberian crane was moved to the resurrected genus Leucogeranus. [13] The genus Leucogeranus had been introduced by the French biologist Charles Lucien Bonaparte in 1855. [14]
Adults of both sexes have a pure white plumage except for the black primaries, alula and primary coverts. The fore-crown, face and side of head is bare and brick red, the bill is dark and the legs are pinkish. The iris is yellowish. Juveniles are feathered on the face and the plumage is dingy brown. There are no elongated tertial feathers as in some other crane species. [15] During breeding season, both the male and female cranes are often seen with mud streaking their feathers; they may intentionally smear mud on their feathers, which has been hypothesized to aid camouflage on the nest. The call is very different from the trumpeting of most cranes and is a goose-like high pitched whistling toyoya. This is a fairly large species of crane, typically weighing 4.9–8.6 kg (11–19 lb) and standing about 140 cm (4 ft 7 in) tall. The wingspan is reportedly from 210 to 260 cm (6 ft 11 in to 8 ft 6 in) and length is 115–127 cm (45–50 in). Males are on average larger than females. [a] The average weight of adults in one study was 6.81 kg (15.0 lb) while juvenile birds were slightly heavier on average at 7.1 kg (16 lb). [22] There is a single record of an outsized male of this species weighing 15 kg (33 lb). Usually, this crane is usually slightly smaller in weight and height than some other cranes, particularly the sarus crane, wattled crane and red-crowned crane. [23]
The breeding area of the Siberian crane formerly extended between the Urals and Ob river south to the Ishim and Tobol rivers and east to the Kolyma region. The populations declined with changes in landuse, the draining of wetlands for agricultural expansion and hunting on their migration routes. The breeding areas in modern times are restricted to two widely disjunct regions. The western area in the river basins of the Ob, Konda and Sossva and to the east a much larger population in Yakutia between the Yana and the Alazeya rivers. [17] Like most cranes, the Siberian crane inhabits shallow marshlands and wetlands and will often forage in deeper water than other cranes. They show very high site fidelity for both their wintering and breeding areas, making use of the same sites year after year. [15] The western population winters in Iran and some individuals formerly wintered in India south to Nagpur and east to Bihar. The eastern populations winter mainly in the Poyang Lake area in China. [17]
Siberian cranes are widely dispersed in their breeding areas and are highly territorial. They maintain feeding territories in winter but may form small and loose flocks, and gather closer at their winter roosts. They are very diurnal, feeding almost all throughout the day. When feeding on submerged vegetation, they often immerse their heads entirely underwater. When calling, the birds stretch their neck forward. [17] The contexts of several calls have been identified and several of these vary with sex. Individual variation is very slight and most calls have a dominant frequency of about 1.4 kHz. [24] The unison calls, duets between paired males and female however are more distinctive with marked differences across pairs. [25] The female produces a higher pitched call which is the "loo" in the duetted "doodle-loo" call. Pairs will walk around other pairs to threaten them and drive them away from their territory. [17] In captivity, one individual was recorded to have lived for nearly 62 years [26] while another lived for 83 years. [27]
These cranes are omnivorous with a tendency to plant matter. In the summer grounds they feed on a range of plants including the roots of hellebore ( Veratrum misae), seeds of Empetrum nigrum as well as small rodents like lemmings and voles, earthworms, and fish. They were earlier thought to be predominantly fish eating on the basis of the serrated edge of their bill, but later studies suggest that they take animal prey mainly when the vegetation is covered by snow. They also swallow pebbles and grit to aid in crushing food in their crop. [17] In their wintering grounds in China, they have been noted to feed to a large extent on the submerged leaves of Vallisneria spiralis . [28] Specimens wintering in India have been found to have mainly aquatic plants in their stomachs. They are however noted to pick up beetles and bird's eggs in captivity. [29] [30]
Siberian cranes return to the Arctic tundra around the end of April and beginning of May. [31] The nest is usually on the edge of lake in boggy ground and is usually surrounded by water. Most eggs are laid in the first week of June when the tundra is snow free. The usual clutch is two eggs, which are incubated by the female after the second egg is laid, with the male standing guard nearby. The eggs hatch in about 27 to 29 days. The young birds fledge in about 80 days. Usually only a single chick survives due to aggression between young birds. The population increase per year is less than 10%, the lowest recruitment rate among cranes. Their success in breeding may further be hampered by disturbance from reindeer and sometimes dogs that accompany reindeer herders. [17] Captive breeding was achieved by the International Crane Foundation at Baraboo after numerous failed attempts. Males often killed their mates and captive breeding was achieved by artificial insemination and the hatching of eggs by other crane species such as the sandhill and using floodlights to simulate the longer daylengths of the Arctic summer. [32]
This species breeds in two disjunct regions in the arctic tundra of Russia; the western population along the Ob, Yakutia, and western Siberia. It is a long distance migrant and among the cranes, makes one of the longest migrations. [17] The eastern population winters on the Yangtze River and Lake Poyang in China, and the western population in Fereydoon Kenar in Iran. The central population, which once wintered in Keoladeo National Park, Bharatpur, is extinct.
The conservation status of the Siberian crane is very serious. In 2008, the decreasing world population was estimated to be around 3500–4000 individuals, nearly all of them belonging to the eastern breeding population. [1] Of the 15 crane species, this is the only regarded as critically endangered, the highest threatened category by the IUCN [1] (the whooping crane of North America has a smaller but rising population that is better protected, giving the species a status of endangered. [33] ) The western population of the Siberian crane had dwindled to four in 2002 and subsequently it was thought to be extirpated, but a single individual, named "Omid", has wintered in Iran since 2006–2007. [1] The wintering site at Poyang in China holds an estimated 98% of the population and is threatened by hydrological changes caused by the Three Gorges Dam and other water development projects.[ citation needed ]
Historical records from India suggest a wider winter distribution in the past including records from Gujarat, near New Delhi and even as far east as Bihar. [18] [34] In the 19th century, larger numbers of birds were noted to visit India. [35] They were sought after by hunters and specimen collectors. In 1974, as many as 75 birds wintered in Bharatpur, but this population declined to a single pair in 1992 and the last bird was seen in 2002. [36] An individual that escaped from a private menagerie was shot in the Outer Hebrides in 1891. [37] The western population may even have wintered as far west as Egypt along the Nile. [38]
Satellite telemetry was used to track the migration of a flock that wintered in Iran. They were noted to rest on the eastern end of the Volga Delta. [39] Satellite telemetry was also used to track the migration of the eastern population in the mid-1990s, leading to the discovery of new resting areas along the species' flyway in eastern Russia and China. [40] The Siberian crane is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies and is subject of the Memorandum of Understanding concerning Conservation Measures for the Siberian Crane concluded under the Bonn Convention.
For the Yakuts and Yukaghirs, the white crane is a sacred bird associated with sun, spring and kind celestial spirits ajyy. In yakut epics Olonkho shamans and shamanesses transform into white cranes.[ citation needed ]
The blue crane, also known as the Stanley crane and the paradise crane, is the national bird of South Africa. The species is listed as Vulnerable by the IUCN.
The brolga, formerly known as the native companion, is a bird in the crane family. It has also been given the name Australian crane, a term coined in 1865 by well-known ornithologist John Gould in his Birds of Australia.
Cranes are a type of large bird with long legs and necks in the biological family Gruidae of the order Gruiformes. The family has 15 species placed in four genera which are Antigone, Balearica, Leucogeranus, and Grus. They are large birds with long necks and legs, a tapering form, and long secondary feathers on the wing that project over the tail. Most species have muted gray or white plumages, marked with black, and red bare patches on the face, but the crowned cranes of the genus Balearica have vibrantly-coloured wings and golden "crowns" of feathers. Cranes fly with their necks extended outwards instead of bent into an S-shape and their long legs outstretched.
The common crane, also known as the Eurasian crane, is a bird of the family Gruidae, the cranes. A medium-sized species, it is the only crane commonly found in Europe besides the demoiselle crane and the Siberian crane that only are regular in the far eastern part of the continent. Along with the sandhill crane, demoiselle crane and the brolga, it is one of only four crane species not currently classified as threatened with extinction or conservation dependent on the species level. Despite the species' large numbers, local extinctions and extirpations have taken place in part of its range, and an ongoing reintroduction project is underway in the United Kingdom.
The black crowned crane is a part of the family Gruidae, along with its sister species, the grey crowned crane. It is topped with its characteristic bristle-feathered golden crown. It is usually found in the shallow wetlands of sub-Saharan Africa during the wet season, which act as its principal breeding, feeding and roosting sites although it can also be found foraging in grasslands and near croplands of dry savanna.
The red knot or just knot is a medium-sized shorebird which breeds in tundra and the Arctic Cordillera in the far north of Canada, Europe, and Russia. It is a large member of the Calidris sandpipers, second only to the great knot. Six subspecies are recognised.
The wattled crane is a large, threatened species of crane found in wetlands and grasslands of eastern and southern Africa, ranging from Ethiopia to South Africa. Some authorities consider it the sole member of the genus Bugeranus.
The curlew sandpiper is a small wader that breeds on the tundra of Arctic Siberia.
The sandhill crane is a species of large crane of North America and extreme northeastern Siberia. The common name of this bird refers to their habitat such as the Platte River, on the edge of Nebraska's Sandhills on the American Great Plains. Sandhill cranes are known to frequent the edges of bodies of water. The central Platte River valley in Nebraska is the most important stopover area for the nominotypical subspecies, the great sandhill crane, with up to 450,000 of these birds migrating through annually.
The whooping crane is an endangered crane species, native to North America, named for its "whooping" calls. Along with the sandhill crane, it is one of only two crane species native to North America, and it is also the tallest North American bird species. The whooping crane's lifespan is estimated to be 22–24 years in the wild. After being pushed to the brink of extinction, due to unregulated hunting and loss of habitat, and just 21 wild cranes remaining by 1941, conservation efforts would lead to a partial recovery. The total number of cranes in the surviving migratory population, plus three reintroduced flocks and in-captivity, only slightly exceeds 800 birds as of 2020.
The red-crowned crane, also called the Manchurian crane, is a large East Asian crane among the rarest cranes in the world. In some parts of its range, it is known as a symbol of luck, longevity, and fidelity.
The demoiselle crane is a species of crane found in central Eurosiberia, ranging from the Black Sea to Mongolia and Northeast China. There is also a small breeding population in Turkey. These cranes are migratory birds. Birds from western Eurasia will spend the winter in Africa while the birds from Asia, Mongolia and China will spend the winter in the Indian subcontinent. The bird is symbolically significant in the culture of India, where it is known as koonj or kurjaa.
The grey crowned crane, also known as the African crowned crane, golden crested crane, golden crowned crane, East African crane, East African crowned crane, African crane, Eastern crowned crane, Kavirondo crane, South African crane, and crested crane, is a bird in the crane family, Gruidae. It is found in nearly all of Africa, especially in eastern and southern Africa, and it is the national bird of Uganda.
The white-naped crane is a bird in the crane family, Gruidae. It is a large bird measuring 112–125 cm long, about 130 cm tall, and weighing about 5.6 kg, with pinkish legs, a grey-and-white-striped neck, and a red face patch.
The black-necked crane is a medium-sized crane in Asia that breeds on the Tibetan Plateau and remote parts of India and Bhutan. It is 139 cm (55 in) long with a 235 cm (7.71 ft) wingspan, and it weighs 5.5 kg (12 lb). It is whitish-gray, with a black head, red crown patch, black upper neck and legs, and white patch to the rear of the eye. It has black primaries and secondaries. Both sexes are similar. Some populations are known to make seasonal movements. It is revered in Buddhist traditions and culturally protected across much of its range. A festival in Bhutan celebrates the bird while the Indian union territory of Ladakh has designated it as the state bird.
Grus is a genus of large birds in the crane family.
The Memorandum of Understanding (MoU) Concerning Conservation Measures for the Siberian Crane is a Multilateral Environmental Memorandum of Understanding and came into effect on 1 July 1993 and was amended in January 1999. It was the first MoU to be concluded under the auspices of the Convention on Migratory Species of Wild Animals (CMS), also known as the Bonn Convention, and focuses on conserving the Siberian crane as one of the three rarest crane species. The MoU covers twelve range states. As of August 2012, eleven range states have signed the MoU.
The sarus crane is a large nonmigratory crane found in parts of the Indian subcontinent, Southeast Asia, and northern Australia. The tallest of the flying birds, standing at a height of up to 1.8 m, they are a conspicuous species of open wetlands in South Asia, seasonally flooded Dipterocarpus forests in Southeast Asia, and Eucalyptus-dominated woodlands and grasslands in Australia.
Vadayil Sankaran Vijayan is an Indian environmentalist, wildlife biologist, ornithologist, an admirer of naturopathy and the founding Director of the Salim Ali Centre for Ornithology and Natural History. He is currently the chairman of the Salim Ali Foundation.
Siberian Crane Leucogeranus leucogeranus (Fig. 3.33) used to be the most charismatic and rare bird at Ghana or the Keoladeo National Park of Bharatpur. At one time, hundreds of "Sibes" used to winter in the Ghana Bird Sanctuary. Like white ghosts in the mist, they were lured by other north Indian wetlands from far and near. The "Sibes" used to visit Ghana from their breeding grounds in Siberia in search of food owing to the nonavailability of summer supplies due to extreme cold. No Siberian Crane was sighted in Bharatpur since 2003.