Bean goose

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Bean goose
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Taiga bean goose (A. fabalis) at Slimbridge Wildfowl and Wetlands Centre, Gloucestershire, England
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Scientific classification
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Brisson, 1760
Species

The bean goose is a species complex of goose that breeds in northern Europe and Eurosiberia. It has at least 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 (taiga bean goose, Anser fabalis, and tundra bean goose, Anser serrirostris), but are considered a single species by other authorities, such as the British Ornithologists' Union.[ not verified in body ] The related pink-footed goose (Anser brachyrhynchus) has also been included in the species complex. It is migratory and winters further south in Europe and Asia.

Contents

Description

The length ranges from 68 to 90 cm (27–35 in), wingspan from 140 to 174 cm (55–69 in) and weight from 1.7–4 kg (3.7–8.8 lb). [2] In the nominate subspecies, males average 3.2 kg (7.1 lb) and females average 2.84 kg (6.3 lb). [2] The bill is black at the base and tip, with an orange band across the middle; the legs and feet are also bright orange.

The upper wing-coverts are dark brown, as in the white-fronted goose (Anser albifrons) and the lesser white-fronted goose (A. erythropus), but differing from these in having narrow white fringes to the feathers.

The voice is a loud honking, higher pitched in the smaller subspecies.

The closely related pink-footed goose (A. brachyrhynchus) has the bill short, bright pink in the middle, and the feet also pink, the upper wing-coverts being nearly of the same bluish-grey as in the greylag goose. In size and bill structure, it is very similar to Anser fabalis rossicus, and in the past was often treated as a sixth subspecies of bean goose.

Reproduction

Bean goose mate for life, and they usually select their mates in the second winter of their lives. Bean goose use courtship to find mates, including a display of tail feathers. Once they chose their mates, they get together, put their heads close together, and sing to each other. This usually happens when a male chases off another male. This is performed throughout the birds lifetime. [3]

They breed yearly, and raise young together. Bean geese typically lay 4 to 6 eggs which are incubated for 27 to 29 days. Bean geese reach sexual maturity at three years. [3]

Taxonomy

The English and scientific names of the bean goose come from its habit in the past of grazing in bean field stubbles in winter. Anser is the Latin for "goose", and fabalis is derived from the Latin faba, a broad bean. [4]

Taiga bean goose (Anser fabalis sensu stricto) on background, tundra bean goose (Anser serrirostris) on foreground and greylag goose (Anser anser) on the right, at Spaarndam, North Holland, the Netherlands Anser fabalis Arnoud B van den Berg.jpg
Taiga bean goose (Anser fabalis sensu stricto) on background, tundra bean goose (Anser serrirostris) on foreground and greylag goose (Anser anser) on the right, at Spaarndam, North Holland, the Netherlands
A flock of tundra bean geese Tundra bean goose.jpg
A flock of tundra bean geese

The species complex comprises the closely related taiga bean goose (Anser fabalis) and tundra bean goose (Anser serrirostris). Together, they contain five subspecies, with complex variation in body size and bill size and pattern. Generally, size increases from north to south and from west to east. Some ornithologists (including AOU 2007) split them into two species based on breeding habitat, whether in forest bogs in the subarctic taiga, or on the arctic tundra. 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. [5] Their subspecies have been treated by some authors as all belonging to a single species, Anser fabalis. [6] The related pink-footed goose (Anser brachyrhynchus) has also been included in the species complex, with a 2023 study recovering it as the sister taxon to A. fabalis, and A. serrirostris as the sister taxon to the two of them. [7] The complex has included several contested species including Sushkin's goose (Anser neglectus).[ citation needed ]

Taiga bean goose (Anser fabalis sensu stricto) (Latham, 1787)

Tundra bean goose (Anser serrirostris, if treated as a distinct species) (Gould, 1852)

Distribution

Egg, Collection Museum Wiesbaden Anser fabalis MWNH 0943.JPG
Egg, Collection Museum Wiesbaden

The bean goose is a rare winter visitor to Britain. There are two regular wintering flocks of taiga bean goose, in the Yare Valley, Norfolk and the Avon Valley, Scotland. A formerly regular flock in Dumfries and Galloway no longer occurs there. The tundra bean goose has no regular wintering sites, but is found in small groups among other grey goose species – among the most regular localities are WWT Slimbridge, Gloucestershire and Holkham Marshes, Norfolk.

The Taiga bean geese Anser fabalis fabalis wintering in Europe are considered to migrate across three different flyways: Western, Central and Eastern; which has been confirmed by stable isotope analysis of their flight feathers. [8]

Related Research Articles

<span class="mw-page-title-main">Greylag goose</span> Species of bird

The greylag goose or graylag goose 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 in length, with an average weight of 3.3 kilograms. 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 1360 BCE. The genus name and specific epithet are from anser, the Latin for "goose".

<span class="mw-page-title-main">Greater white-fronted goose</span> Species of bird

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.

<span class="mw-page-title-main">Taiga bean goose</span> Species of bird

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.

<span class="mw-page-title-main">Pink-footed goose</span> Species of bird

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".

<span class="mw-page-title-main">Lesser white-fronted goose</span> Species of bird

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.

<span class="mw-page-title-main">Snow goose</span> Species of bird

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.

<span class="mw-page-title-main">Emperor goose</span> Species of bird

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.

<span class="mw-page-title-main">Swan goose</span> Species of bird

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.

<i>Branta</i> Genus of birds

The black geese of the genus Branta are waterfowl belonging to the true geese and swans subfamily Anserinae. They occur in the northern coastal regions of the Palearctic and all over North America, migrating to more southerly coasts in winter, and as resident birds in the Hawaiian Islands. Alone in the Southern Hemisphere, a self-sustaining feral population derived from introduced Canada geese is also found in New Zealand.

<span class="mw-page-title-main">Ross's goose</span> Species of bird

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.

<span class="mw-page-title-main">Domestic goose</span> Common name for a bird

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.

<i>Anser</i> (bird) Genus of birds

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.

Jacques Van Impe is a Belgian academic widely published in the field of ornithology. His research is particularly focused on reproduction in the greater white-fronted goose, the bean goose, the Eurasian oystercatcher, the pied avocet, the northern lapwing, the black-tailed godwit, and the common redshank.

<span class="mw-page-title-main">Tundra bean goose</span> Species of bird

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 Slamannan Plateau is a geographic area and special protection area in the Central Belt of Scotland which encompasses the small villages of Slamannan, Limerigg and Caldercruix. It is situated 5 km south of Falkirk and about 4 km east of Cumbernauld, at around 170 m above sea level.

<span class="mw-page-title-main">Užava lowland</span> Protected landscape area

Užava lowland is nature park Ventspils Municipality. It is located in the Užava river floodplain Užavas and Ziru parishes, occupies a large part of the currently dysfunctional Užava polder. Natura 2000 site.

<span class="mw-page-title-main">Sushkin's goose</span> Species of goose thought to be extinct

Sushkin's goose is a putative species of goose now thought to be extinct. The status as a species has remained contested. It has sometimes been considered a subspecies of the bean goose but some have proposed, based on descriptions in life and specimens, that it was distinctive enough to be treated as a full species. It has been suggested that the Tunguska event of 1908 may have wiped out most of the breeding population in the Taiga region resulting in its dwindling to extinction. Some geese with "neglectus" type characters have been recorded suggesting that the last few populations hybridized with other geese such as the tundra and taiga bean goose in the breeding region.

References

  1. BirdLife International (2018). "Anser fabalis". IUCN Red List of Threatened Species . 2018: e.T22679875A132302864. doi: 10.2305/IUCN.UK.2018-2.RLTS.T22679875A132302864.en . Retrieved 4 December 2023.
  2. 1 2 Dunning, John B. Jr., ed. (1992). CRC Handbook of Avian Body Masses. CRC Press. ISBN   978-0-8493-4258-5.
  3. 1 2 Clark, Emily. "Anser fabalis (bean goose)". Animal Diversity Web. Retrieved 15 May 2023.
  4. Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp.  48, 157. ISBN   978-1-4081-2501-4.
  5. Ottenburghs, Jente; Honka, Johanna; Müskens, Gerard J. D. M.; Ellegren, Hans (26 May 2020). "Recent introgression between Taiga Bean Goose and Tundra Bean Goose results in a largely homogeneous landscape of genetic differentiation". Heredity. 125 (1–2): 73–84. doi: 10.1038/s41437-020-0322-z . ISSN   1365-2540. PMC   7413267 . PMID   32451423.
  6. Honka, Johanna; Kvist, Laura; Heikkinen, Marja E.; Helle, Pekka; Searle, Jeremy B.; Aspi, Jouni (February 2017). "Determining the subspecies composition of bean goose harvests in Finland using genetic methods". European Journal of Wildlife Research. 63 (1). doi:10.1007/s10344-017-1077-6. ISSN   1612-4642.
  7. Ottenburghs, Jente; Honka, Johanna; Heikkinen, Marja E.; Madsen, Jesper; Müskens, Gerhard J. D. M.; Ellegren, Hans (19 January 2023). "Highly differentiated loci resolve phylogenetic relationships in the Bean Goose complex". BMC Ecology and Evolution. 23: 2. doi: 10.1186/s12862-023-02103-3 . ISSN   2730-7182. PMC   9854053 . PMID   36658479.
  8. Fox, A. D.; Hobson, K. A.; de Jong, A.; Kardynal, K. J.; Koehler, G.; Heinicke, T. (2017). "Flyway population delineation in Taiga Bean Geese Anser fabalis fabalis revealed by multi-element feather stable isotope analysis". Ibis. 159 (1): 66–75. doi:10.1111/ibi.12417.

Further reading