The greylag goose or graylag goose (Anser anser) is a species of large goose in the waterfowl family Anatidae and the type species of the genus Anser. It has mottled and barred grey and white plumage and an orange beak and pink legs. A large bird, it measures between 74 and 91 centimetres (29 and 36in) in length, with an average weight of 3.3 kilograms (7lb 4oz). Its distribution is widespread, with birds from the north of its range in Europe and Asia often migrating southwards to spend the winter in warmer places, although many populations are resident, even in the north. It is the ancestor of most breeds of domestic goose, having been domesticated at least as early as 1360BCE. The genus name and specific epithet are from anser, the Latin for "goose".
Greylag geese travel to their northerly breeding grounds in spring, nesting on moorlands, in marshes, around lakes and on coastal islands. They normally mate for life and nest on the ground among vegetation. A clutch of three to five eggs is laid; the female incubates the eggs and both parents defend and rear the young. The birds stay together as a family group, migrating southwards in autumn as part of a flock, and separating the following year. During the winter they occupy semi-aquatic habitats, estuaries, marshes and flooded fields, feeding on grass and often consuming agricultural crops. Some populations, such as those in southern England and in urban areas across the species' range, are primarily resident and occupy the same area year-round.
Two subspecies are recognised: A. a. anser, the western greylag goose, which breeds in Iceland and northern and central Europe and A. a. rubrirostris, the eastern greylag goose, which breeds in Romania, Turkey, and Russia eastwards to northeastern China.[4] The two subspecies intergrade where their ranges meet. The greylag goose sometimes hybridises with other species of goose, including the barnacle goose (Branta leucopsis) and the Canada goose (Branta canadensis), and occasionally with the mute swan (Cygnus olor).[6] The greylag goose was one of the first animals to be domesticated; this happened at least 3,000 years ago in Ancient Egypt, the domestic subspecies being known as A. a. domesticus.[7] As the domestic goose is a subspecies of the greylag goose they are able to interbreed, with the offspring sharing characteristics of both wild and domestic birds.[8]
Description
Head of an adult
The greylag is the largest and bulkiest of the grey geese of the genus Anser, but is more lightly built and agile than its domestic relative. It has a rotund, bulky body, a thick and long neck, and a large head and bill. It has pink legs and feet, and an orange or pink bill with a white or brown nail (hard horny material at tip of upper mandible).[9] It is 74 to 91 centimetres (29 to 36in) long with a wing length of 41.2 to 48 centimetres (16+1⁄4 to 19in). It has a tail 6.2 to 6.9 centimetres (2+7⁄16 to 2+11⁄16in), a bill of 6.4 to 6.9 centimetres (2+1⁄2 to 2+11⁄16in) long, and a tarsus of 7.1 to 9.3 centimetres (2+13⁄16 to 3+11⁄16in). It weighs 2.16 to 4.56 kilograms (4lb 12oz to 10lb 1oz), with a mean weight of around 3.3 kilograms (7lb 4oz). The wingspan is 147 to 180 centimetres (58 to 71in).[10][11][12] Males are generally larger than females, with the sexual dimorphism more pronounced in the eastern subspecies rubirostris, which is larger than the nominate subspecies on average.[9]
Three domesticated hybrids of greylag geese at Koutavos Lagoon, Cephalonia, Greece.Three eastern greylag geese (A. a. rubrirostris) at Keoladeo National Park in Rajasthan, India
The plumage of the greylag goose is greyish brown, with a darker head and paler breast and belly with a variable amount of black spotting. It has a pale grey forewing and rump which are noticeable when the bird is in flight or stretches its wings on the ground. It has a white line bordering its upper flanks, and its wing coverts are light coloured, contrasting with its darker flight feathers. Its plumage is patterned by the pale fringes of the feathers. Juveniles differ mostly in their lack of black speckling on the breast and belly and by their greyish legs.[9][13] Adults have a distinctive 'concertina' pattern of folds in the feathers on their necks.
A interspecific hybrid between a wild greylag goose and a domesticatedswan goose (A. cygnoides domesticus), as evidenced by its thick neck and bulky head, both of which display vestigial patterning similar to that of the swan goose
The greylag goose has a loud cackling call similar to that of the domestic goose, "aahng-ung-ung", uttered on the ground or in flight. There are various subtle variations used under different circumstances, and individual geese seem to be able to identify other known geese by their voices. The sound made by a flock of geese resembles the baying of hounds.[14] Goslings chirp or whistle lightly, and adults hiss if threatened or angered.[9]
Distribution and habitat
This species has a Palearctic distribution. The nominate subspecies breeds in Iceland, Norway, Sweden, Denmark, Finland, the Baltic States, northern Russia, Poland, eastern Hungary, Romania, Germany and the Netherlands. It also breeds locally in the United Kingdom, Belgium, Austria, the Czech Republic, Slovakia, North Macedonia and some other European countries. The eastern race extends eastwards across a broad swathe of Asia to China.[14] Historically, European birds generally migrated southwards to spend winter in southern Europe and North Africa,[14] but in recent decades many instead overwinter in or near their breeding range, even in Scandinavia.[15][16] Asian birds migrate to Azerbaijan, Iran, Pakistan, northern India, Bangladesh and eastward to China.[14] Greylags also occur as very rare winter migrants to South Korea and Japan.[17]
In North America, there are both feral domestic geese, which are similar to greylags, and occasional vagrant greylags.[13] Greylag geese seen in the wild in New Zealand probably originated from the escape of farmyard geese,[18] and a similar situation has occurred in Australia, where feral birds are now established in the east and southeast of the country.[19]
In their breeding quarters, they are found on moors with scattered lochs, in marshes, fens and peat-bogs, besides lakes and on little islands some way out to sea. They like dense ground cover of reeds, rushes, heather, bushes and willow thickets. In their winter quarters, they frequent salt marshes, estuaries, freshwater marshes, steppes, flooded fields, bogs and pasture near lakes, rivers and streams. They also visit agricultural land where they feed on winter cereals, rice, beans or other crops, moving at night to shoals and sand-banks on the coast, mud-banks in estuaries or secluded lakes.[14] Large numbers of immature birds congregate each year to moult on the Rone Islands near Gotland in the Baltic Sea.[20]
Since the 1950s, increases in winter temperatures have resulted in greylag geese breeding in northern and central Europe, reducing their winter migration distances or even becoming resident.[15][16][21] Wintering grounds closer to home can therefore be exploited, meaning that the geese can return to set up breeding territories earlier the following spring.[21]
In Great Britain, their numbers had declined as a breeding bird, retreating north to breed wild only in the Outer Hebrides and the northern mainland of Scotland. However, during the 20th century, feral populations have been established elsewhere, and they have now re-colonised much of England. These populations are increasingly coming into contact and merging.[22]
The greylag goose has become a pest species in several areas where its population has increased sharply. In Norway, the number of greylag geese is estimated to have increased three- to fivefold between 1995 and 2015. As a consequence, farmers' problems caused by goose grazing on farmland have increased considerably. This problem is also evident for the pink-footed goose. In the Orkney islands the population has increased dramatically: there were 300 breeding pairs, increasing to 10,000 in 2009, and 64,000 in 2019. Due to extensive damage caused to crops, the hunting season for the greylag goose in the Orkney islands is now most of the year.[23]
Behaviour
In a group, many pairs of eyes are on watch
Greylag geese are largely herbivorous and feed chiefly on grasses. Short, actively growing grass is more nutritious and greylag geese are often found grazing in pastures with sheep or cows.[24] Because of its low nutrient status, they need to feed for much of their time; the herbage passes rapidly through the gut and is voided frequently.[25] The tubers of sea clubrush (Bolboschoenus maritimus) are also taken as well as berries and water plants such as duckweed (Lemna) and floating sweetgrass (Glyceria fluitans). In wintertime they eat grass and leaves but also glean grain on cereal stubbles and sometimes feed on growing crops, especially during the night. They have been known to feed on oats, wheat, barley, buckwheat, lentils, peas and root crops. Acorns are sometimes consumed, and on the coast, seagrass (Zostera sp.) may be eaten.[14] In the 1920s in Britain, the pink-footed goose "discovered" that potatoes were edible and started feeding on waste potatoes. The greylag followed suit in the 1940s and now regularly searches for tubers on ploughed fields.[20] They also consume small fish, amphibians, crustaceans, molluscs and insects.[26]
Six eggs in the nest at Mekszikópuszta, HungaryA group of goslings of greylag geese
Greylag geese tend to pair bond in long-term monogamous relationships.[27] Most such pairs are probably life-long partnerships, though 5 to 8% of the pairs separate and re-mate with other geese.[27] Birds in heterosexual pairs may engage in promiscuous behavior, despite the opposition of their mates.[27]
Homosexual pairs are common (14 to 20% of the pairs may be ganders, depending on flock), and share the characteristics of heterosexual pairs with the exceptions that the bonds appear to be closer, based on the intensity of their displays.[27] Same-sex pairs also engage in courtship and sexual relations, and often assume high-ranking positions in the flock as a result of their superior strength and courage, leading some to speculate that they may serve as guardians of the flock.[27] The sexual preference of the birds is generally flexible, as more than half of widowers re-pair with a bird of the opposite sex.[27]
The nest is on the ground among heather, rushes, dwarf shrubs or reeds, or on a raft of floating vegetation. It is built from pieces of reed, sprigs of heather, grasses and moss, mixed with small feathers and down. A typical clutch is four to six eggs, but fewer eggs or larger numbers are not unusual. The eggs are creamy-white at first but soon become stained, and average 85 by 58 millimetres (3+3⁄8 by 2+5⁄16in). They are mostly laid on successive days and incubation starts after the last one is laid. The female does the incubation, which lasts about twenty-eight days, while the male remains on guard somewhere near. The chicks are precocial and able to leave the nest soon after hatching. Both parents are involved in their care and they soon learn to peck at food and become fully-fledged at eight or nine weeks,[14] about the same time as their parents regain their ability to fly after moulting their main wing and tail feathers a month earlier. Immature birds undergo a similar moult, and move to traditional, safe locations before doing so because of their vulnerability while flightless.[24]
Migrating flockGreylag goose can gather in very large flocks of thousands of individuals.
Greylag geese are gregarious birds and form flocks. This has the advantage for the birds that the vigilance of some individuals in the group allows the rest to feed without having to constantly be alert to the approach of predators. After the eggs hatch, some grouping of families occur, enabling the geese to defend their young by their joint actions, such as mobbing or attacking predators.[24] After driving off a predator, a gander will return to its mate and give a "triumph call", a resonant honk followed by a low-pitched cackle, uttered with neck extended forward parallel with the ground. The mate and even unfledged young reciprocate in kind.[14]
Young greylags stay with their parents as a family group, migrating with them in a larger flock, and only dispersing when the adults drive them away from their newly established breeding territory the following year.[25] At least in Europe, patterns of migration are well understood and follow traditional routes with known staging sites and wintering sites. The young learn these locations from their parents which normally stay together for life.[20] Greylags leave their northern breeding areas relatively late in the autumn, for example completing their departure from Iceland by November, and start their return migration as early as January. Birds that breed in Iceland overwinter in the British Isles; those from Central Europe overwinter as far south as Spain and North Africa; others migrate down to the Balkans, Turkey and Iraq for the winter.[28]
Geese are important to multiple culinary traditions. The meat, liver and other organs, fat, skin and blood are used culinarily in various cuisines.[29]
The greylag was once revered across Eurasia. It was linked with the goddess of healing, Gula, a forerunner of the Sumerian fertility goddess Ishtar, in the cities of the Tigris-Euphrates delta over 5,000 years ago.[30] In Ancient Egypt, geese symbolised the sun god Ra. In Ancient Greece and Rome, they were associated with the goddess of love, Aphrodite, and goose fat was used as an aphrodisiac. Since they were sacred birds, they were kept on Rome's Capitoline Hill, from where they raised the alarm when the Gauls attacked in 390BCE.[30]
The goose's role in fertility survives in modern British tradition in the nursery rhymeGoosey Goosey Gander, which preserves its sexual overtones ("And in my lady's chamber"), while "to goose" still has a sexual meaning.[30] The tradition of pulling a wishbone derives from the tradition of eating a roast goose at Michaelmas, where the goose bone was once believed to have the powers of an oracle. For that festival, in Thomas Bewick's time, geese were driven in thousand-strong flocks on foot from farms all over the East of England to London's Cheapside market, covering some 13 or 14 kilometres (8 or 9mi) per day. Some farmers painted the geese's feet with tar and sand to protect them from road wear as they walked.[30]
Greylag geese were domesticated by at least 1360BCE, when images of domesticated birds resembling the eastern race, Anser anser rubirostris (which like modern farmyard geese, but unlike western greylags, have a pink beak) were painted in Ancient Egypt. Goose feathers were used as quill pens, the best being the primary feathers of the left-wing, whose "curvature bent away from the eyes of right-handed writers".[31] The feathers also served to fletch arrows.[30] In ethology, the greylag goose was the subject of Konrad Lorenz's pioneering studies of imprintingbehaviour.[32]
Poultry are domesticated birds kept by humans for the purpose of harvesting animal products such as meat, eggs or feathers. The practice of raising poultry is known as poultry farming. These birds are most typically members of the superorder Galloanserae (fowl), especially the order Galliformes. The term also includes waterfowls of the family Anatidae but does not include wild birds hunted for food known as game or quarry.
A goose is a bird of any of several waterfowl species in the family Anatidae. This group comprises the genera Anser and Branta. Some members of the Tadorninae subfamily are commonly called geese, but are not considered "true geese" taxonomically. More distantly related members of the family Anatidae are swans, most of which are larger than true geese, and ducks, which are smaller.
The greater white-fronted goose is a species of goose that is closely related to the smaller lesser white-fronted goose. The greater white-fronted goose is migratory, breeding in northern Canada, Alaska, Greenland and Russia, and winters farther south in North America, Europe and Asia. It is named for the patch of white feathers bordering the base of its bill: albifrons comes from the Latin albus "white" and frons "forehead". In the United Kingdom and Ireland, it has been known as the white-fronted goose; in North America it is known as the greater white-fronted goose, and this name is also increasingly adopted internationally. Even more distinctive are the salt-and-pepper markings on the breast of adult birds, which is why the goose is colloquially called the "specklebelly" in North America.
The taiga bean goose is a goose that breeds in northern Europe and Asia. It is migratory and winters further south in Europe and Asia. This and the tundra bean goose are recognised as separate species by the American Ornithological Society and the International Ornithologists' Union, but are considered a single species by other authorities. The taiga and tundra bean goose diverged about 2.5 million years ago and established secondary contact c. 60,000 years ago, resulting in extensive gene flow.
The pink-footed goose is a goose which breeds in eastern Greenland, Iceland, Svalbard, and recently Novaya Zemlya. It is migratory, wintering in northwest Europe, especially Ireland, Great Britain, the Netherlands, and western Denmark. The name is often abbreviated in colloquial usage to "pinkfoot". Anser is the Latin for "goose", and brachyrhynchus comes from the ancient Greek brachus "short" and rhunchos "bill".
The lesser white-fronted goose is a goose closely related to the larger greater white-fronted goose. It breeds in the northernmost Palearctic, but it is a scarce breeder in Europe, with a reintroduction attempt in Fennoscandia.
The snow goose is a species of goose native to North America. Both white and dark morphs exist, the latter often known as blue goose. Its name derives from the typically white plumage. The species was previously placed in the genus Chen, but is now typically included in the "gray goose" genus Anser.
The Canada goose, sometimes called Canadian goose, is a large wild goose with a black head and neck, white cheeks, white under its chin, and a brown body. It is native to the arctic and temperate regions of North America, and it is occasionally found during migration across the Atlantic in northern Europe. It has been introduced to France, the United Kingdom, Ireland, Finland, Sweden, Denmark, New Zealand, Japan, Chile, Argentina, and the Falkland Islands. Like most geese, the Canada goose is primarily herbivorous and normally migratory; often found on or close to fresh water, the Canada goose is also common in brackish marshes, estuaries, and lagoons.
The common merganser or goosander (Eurasian) is a large sea duck of rivers and lakes in forested areas of Europe, Asia, and North America. The common merganser eats mainly fish. It nests in holes in trees.
The emperor goose, also known as the beach goose or the painted goose, is a waterfowl species in the family Anatidae, which contains the ducks, geese, and swans. In summer, the emperor goose is found in remote coastal areas near the Bering Sea in arctic and sub-arctic Alaska and the Russian Far East, where it breeds in monogamous pairs. It migrates south to winter in ice-free mudflats and coasts in Alaska, mostly the Aleutian Islands, and Canada's British Columbia, rarely reaching the contiguous United States. Listed as near threatened by the International Union for Conservation of Nature, the species' population is declining due to threats such as pollution, hunting, and climate change.
The swan goose is a large goose with a natural breeding range in inland Mongolia, Northeast China, and the Russian Far East. It is migratory and winters mainly in central and eastern China. Vagrant birds are encountered in Japan and Korea, and more rarely in Kazakhstan, Laos, coastal Siberia, Taiwan, Thailand and Uzbekistan.
Ross's goose, formerly Chen rossii, is a white goose with black wingtips and a relatively short neck. It is the smallest of the three white geese that breed in North America. It is similar in appearance to a white-phase snow goose, but about 40% smaller. Other differences from the snow goose are that the bill is smaller in proportion to its body and lacks "black lips". Like snow geese, Ross's geese may exhibit a darker "blue" phase or morph, though this is extremely rare.
The upland goose or Magellan goose is a sheldgoose of the shelduck-sheldgoose subfamily of the Anatidae, the biological family that includes the ducks and most duck-like waterfowl such as the geese and swans. Sheldgeese resemble true geese and display similar habits, yet they are more closely related to shelducks and ducks. The two recognized subspecies of upland goose are the continental picta subspecies and the insular (island) leucoptera subspecies.
A domestic goose is a goose that humans have domesticated and kept for their meat, eggs, or down feathers, or as companion animals. Domestic geese have been derived through selective breeding from the wild greylag goose and swan goose.
Anser is a waterfowl genus that includes the grey geese and the white geese. It belongs to the true goose and swan subfamily of Anserinae under the family of Anatidae. The genus has a Holarctic distribution, with at least one species breeding in any open, wet habitats in the subarctic and cool temperate regions of the Northern Hemisphere in summer. Some also breed farther south, reaching into warm temperate regions. They mostly migrate south in winter, typically to regions in the temperate zone between the January 0 °C (32 °F) and 5 °C (41 °F) isotherms.
The Sebastopol is a breed of domestic goose, descended from the European Greylag goose. First exhibited in England in 1860 under the name 'Sebastopol goose'; they were also referred to as Danubian geese, a name first used for the breed in Ireland in 1863. 'Danubian' was used as a synonym in the 19th century; and only given precedence by Edward Brown after the turn of the 19th century. The Sebastopol is a medium-sized goose with long, white curly feathers. The feathers of the neck are smooth and sometimes greyish brown. Crosses have produced all-grey, buff, and saddle back variants. Feathers on the breast may be curly (frizzle) or smooth. The gander weighs 12-14 lbs while the goose weighs 10-12 lbs. The legs and shanks are orange and the eyes bright blue. Grey and buff colored Sebastopol have brown eyes. On average, females produce 25-35 eggs per year. Though domesticated breeds of geese generally retain some flight ability, Sebastopols cannot fly well due to the curliness of their feathers and have difficulty getting off the ground. They need plenty of water to keep themselves clean, and to clean their sinuses.
The Pomeranian goose, also known as the Rügener goose, is a breed of domestic goose.
The tundra bean goose is a goose that breeds in northern Siberia. This and the taiga bean goose are recognised as separate species by the American Ornithological Society and International Ornithologists' Union, but are considered a single species by other authorities. It is migratory and winters further south in Asia. The taiga and tundra bean goose diverged about 2.5 million years ago and established secondary contact ca. 60,000 years ago, resulting in extensive gene flow.
The bean goose is a goose that breeds in northern Europe and Eurosiberia. It has two distinct varieties, one inhabiting taiga habitats and one inhabiting tundra. These are recognised as separate species by the American Ornithologists' Union and the IOC, but are considered a single species by other authorities, such as the British Ornithologists' Union. It is migratory and winters further south in Europe and Asia.
1 2 Podhrázský, M.; Musil, P.; Musilová, Z.; Zouhar, J.; Adam, M.; Závora, J.; Hudec, K. (2017). "Central European Greylag Geese Anser anser show a shortening of migration distance and earlier spring arrival over 60years". Ibis. 159 (2): 352–365. doi:10.1111/ibi.12440.
↑ "Greylag Goose ( Anser anser ) movements"(PDF). British Trust for Ornithology. Retrieved 24 October 2015. stated to be from Delany, S.; Veen, J.; Clark, J.A., eds. (2006). Urgent preliminary assessment of ornithological data relevant to the spread of Avian Influenza in Europe. Report to the European Commission. Study contract: 07010401/2005/425926/MAR/B4.
This page is based on this Wikipedia article Text is available under the CC BY-SA 4.0 license; additional terms may apply. Images, videos and audio are available under their respective licenses.
