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Barnacle Goose Branta leucopsis
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This species has a very large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be increasing, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Taxonomic source(s)
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: # _the_WP15.xls#.
Cramp, S.; Perrins, C. M. 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.

Trend justification
The overall trend is suspected to be increasing (Wetlands International 2006).

Behaviour This species is fully migratory and travels on a narrow front (Kear 2005a) between extremely localised breeding and wintering areas (del Hoyo et al. 1992). It is present on its breeding grounds from May or June to August or September (Kear 2005a) where it breeds in small but often closely packed colonies (Madge and Burn 1988, del Hoyo et al. 1992) of 5-50 pairs, occasionally singly or in groups of up to 150 pairs (Snow and Perrins 1998). It uses the same nesting sites year after year (Johnsgard 1978) and sometimes nests among seabird colonies (Madge and Burn 1988). After the young hatch the adults undergo a flightless moult period near the breeding grounds between mid-July and mid-August that lasts for 3-4 weeks (Scott and Rose 1996). The species migrates to autumn staging areas in September (Kear 2005a) from which it travels via regular stop-over sites (Madge and Burn 1988) to the wintering grounds, arriving in late-September (Kear 2005a). The return migration begins in April or May, the species moving to spring staging areas where it may be present for 20-30 days before migrating northwards (Kear 2005a). The species is highly gregarious outside of the breeding season, often feeding in dense concentrations on coastal grasslands during the winter (Madge and Burn 1988). In winter habitats it roosts on water (Madge and Burn 1988) or on sandbanks near saltmarshes and pastureland (Peberdy 1991). Habitat Breeding The species breeds in Arctic semi-desert tundra (fjellmark) (Kear 2005a)on crags, rocky outcrops (del Hoyo et al. 1992), cliffs, rocky slopes (Johnsgard 1978) and coastal islands (Svalbard) (Kear 2005a) near wetlands such as lakes, rivers, marshes, the upper parts of fjords, coastlines (Johnsgard 1978), wet meadows and mudflats (Kear 2005a). In years when the snow is slow to melt the species first forages on grassy vegetation on south-facing mountain slopes fertilised by the droppings of cliff-nesting seabirds before moving down to breeding areas (Kear 2005a). It also returns to these slopes after the moulting period before autumn migration (Kear 2005a). After the young hatch families may disperse away from rocky ground to more vegetated areas surrounding tundra lakes and rivers (Kear 2005a). Non-breeding During the non-breeding season the species frequents tidal mudflats, saltmarshes (Johnsgard 1978, Kear 2005a) and adjacent coastal meadows (Johnsgard 1978, del Hoyo et al. 1992) (especially improvedrough pasturesand arable land (del Hoyo et al. 1992, Kear 2005a)), with agricultural fields becoming increasingly more important as winter feeding areas (Scott and Rose 1996). Diet The species is herbivorous (del Hoyo et al. 1992) its diet consisting of the leaves, stems and seed-heads of grasses, sedges, aquatic plants (del Hoyo et al. 1992, Kear 2005a), mosses (Kear 2005a), various herbs (especially white clover Trifolium repens in the winter) (Peberdy 1991, Vickery and Gill 1999) and shrubs (e.g. arctic willow Salix arctica) (Johnsgard 1978). It may also take agricultural grain and vegetables during the winter (del Hoyo et al. 1992). Breeding site The nest is a shallow depression in a low mound of vegetation (Snow and Perrins 1998) positioned on rocky ground (del Hoyo et al. 1992, Kear 2005a), rocky outcrops (Johnsgard 1978, Snow and Perrins 1998), among rocky crags, on steep cliffs (Johnsgard 1978, Madge and Burn 1988, Snow and Perrins 1998), on the tops of low hills (Johnsgard 1978), or on low vegetation hummocks and snow-free patches on islands in river channels (Snow and Perrins 1998). Nesting sites accumulate nesting materials as they are often used year after year (Johnsgard 1978), and the species may sometimes nest among seabird colonies (Madge and Burn 1988). Management information An investigation carried out in one of the species's wintering areas (UK) found that it was most likely to forage on improved grasslands with high abundances of the grass Lolium perenne and white clover Trifolium repens (Vickery and Gill 1999) (the growth of which is greatly influenced by the amount of summer grazing, which controls the grass height) (Peberdy 1991). Preferred fields were between 4 and 10 ha in area (the species avoided fields of less than 2-3 ha), and at an optimal distance of less than 5 km away from roosting sites (maximum 7 km away) (Vickery and Gill 1999). The species was also found to show a preference for grasslands with swards less than 10 cm in height (optimum 2 cm) in fields that had been cut for silage and then grazed (although there was no major difference in feeding intensity on pastures grazed with different livestock) (Vickery and Gill 1999). Overall winter use of grassland fertilised with large amounts of nitrogen was significantly greater than the use of unfertilised grassland by the species (Vickery and Gill 1999). The Barnacle Goose Management Scheme (BGMS) in Scotland, UK recommends fertilising farmland adjacent to reserves containing wintering groups of this species at times when geese are present (e.g. autumn or winter) and grazing stock (sheep or cattle) are absent (Cope et al. 2003). The BGMS also awards payments to farmers who manage pastures outside of established reserves for reducing the level of disturbance (e.g. scaring away feeding flocks) on their land (Cope et al. 2003).

Today the species is fully protected throughout its range, although adults, eggs and down were once exploited by humans (Kear 2005a), and the species may be disturbed by shooting even though it is not directly hunted (Peberdy 1991). The species faces possible threats from persecution (disturbance) by farmers as in winter it favours grasslands and pastures used for grazing livestock (Cope et al. 2003). The species also suffers from nest predation by arctic fox Vulpes lagopus in Svalbard (Madsen et al. 1992).

Cope, D. R.; Pettifor, R. A.; Griffin, L. R.; Rowcliffe, J. M. 2003. Integrating farming and wildlife conservation: the Barnacle Goose Management Scheme. Biological Conservation 110: 113-122.

del Hoyo, J.; Elliot, A.; Sargatal, J. 1992. Handbook of the Birds of the World, vol. 1: Ostrich to Ducks. Lynx Edicions, Barcelona, Spain.

Delany, S.; Scott, D. 2006. Waterbird population estimates. Wetlands International, Wageningen, The Netherlands.

Johnsgard, P. A. 1978. Ducks, geese and swans of the World. University of Nebraska Press, Lincoln and London.

Kear, J. 2005. Ducks, geese and swans volume 1: general chapters; species accounts (Anhima to Salvadorina). Oxford University Press, Oxford, U.K.

Madge, S.; Burn, H. 1988. Wildfowl. Christopher Helm, London.

Madsen, J.; Bregnballe, T.; Hastrup, A. 1992. Impact of the Arctic Fox Alopex lagopus on nesting success of geese in south-east Svalbard, 1989. Polar Research 11(2): 35-39.

Peberdy, K. 1991. The use of grazed saltmarsh by Branta leucopsis (barnacle goose) in relation to refuge establishment and management. In: Finlayson, C. M.; Larsson, T. (ed.), Wetland management and restoration, pp. 95-107. Swedish Environmental Protection Agency, Solna.

Scott, D. A.; Rose, P. M. 1996. Atlas of Anatidae populations in Africa and western Eurasia. Wetlands International, Wageningen, Netherlands.

Snow, D. W.; Perrins, C. M. 1998. The Birds of the Western Palearctic vol. 1: Non-Passerines. Oxford University Press, Oxford.

Vickery, J. A.; Gill, J. A. 1999. Managing grassland for wild geese in Britain: a review. Biological Conservation 89: 93-106.

Further web sources of information
Detailed species account from Birds in Europe: population estimates trends and conservation status (BirdLife International 2004)

Detailed species account from Birds in Europe: population estimates, trends and conservation status (BirdLife International 2004)

Explore HBW Alive for further information on this species

Jump to the case study for this species in Wildlife comeback in Europe: The recovery of selected mammal and bird species (Deniet et al. 2003)

Search for photos and videos, and hear sounds of this species from the Internet Bird Collection

Text account compilers
Ekstrom, J., Butchart, S., Malpas, L.

IUCN Red List evaluators
Butchart, S., Symes, A.

Recommended citation
BirdLife International (2016) Species factsheet: Branta leucopsis. Downloaded from on 28/10/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from on 28/10/2016.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Additional resources for this species

ARKive species - Barnacle goose (Branta leucopsis) 0

Key facts
Current IUCN Red List category Least Concern
Family Anatidae (Ducks, Geese, Swans)
Species name author (Bechstein, 1803)
Population size mature individuals
Population trend Increasing
Distribution size (breeding/resident) 82,800 km2
Country endemic? No
Links to further information
- Additional Information on this species
- 2015 European Red List assessment