Data Zone
Taxonomic source(s)
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: #http://www.aerc.eu/DOCS/Bird_taxa_of _the_WP15.xls#.
Cramp, S. and Simmons, K.E.L. (eds). 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. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2021 | Least Concern | |
| 2016 | Least Concern | |
| 2012 | Least Concern | |
| 2009 | Least Concern | |
| 2008 | Least Concern | |
| 2004 | Least Concern | |
| 2000 | Lower Risk/Least Concern | |
| 1994 | Lower Risk/Least Concern | |
| 1988 | Lower Risk/Least Concern |
| Migratory status | full migrant | Forest dependency | Does not normally occur in forest |
| Land mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 25,800,000 | medium |
| Extent of Occurrence non-breeding (km2) | 18,200,000 | medium |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 2000000 | poor | estimated | 2018 |
| Population trend | Increasing | inferred | - | |
| Decline (3 years/1 generation past) | - | - | - | |
| Decline (5 years/1 generation past) | - | - | - | |
| Decline (10 years/1 generation past) | - | - | - | |
| Decline (10 years/3 generation future) | - | - | - | |
| Decline (10 years/3 generation past and future) | - | - | - | |
| Number of subpopulations | - | - | - | |
| Percentage in largest subpopulation | - | - | - | |
| Generation length (yrs) | 4.48 | - | - | - |
Population justification: The global population is estimated to number 2,000,000 mature individuals and is increasing (Meehan et al. 2018, Pardieck et al. 2018, Partners in Flight 2020).
Trend justification: The species is increasing rapidly (Meehan et al. 2018, Pardieck et al. 2018, Partners in Flight 2020).
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Algeria | V | Extant | ||||
| Anguilla (to UK) | N | Extant | Yes | |||
| Antigua and Barbuda | V | Extant | ||||
| Aruba (to Netherlands) | N | Extant | Yes | |||
| Austria | V | Extant | ||||
| Bahamas | N | Extant | Yes | |||
| Barbados | N | Extant | Yes | |||
| Belgium | V | Extant | ||||
| Belize | N | Extant | Yes | |||
| Bermuda (to UK) | N | Extant | Yes | |||
| Bonaire, Sint Eustatius and Saba (to Netherlands) | V | Extant | ||||
| Canada | N | Extant | Yes | Yes | Yes | |
| Cape Verde | V | Extant | ||||
| Cayman Islands (to UK) | N | Extant | Yes | Yes | Yes | |
| Colombia | V | Extant | ||||
| Costa Rica | N | Extant | Yes | |||
| Cuba | N | Extant | Yes | |||
| Curaçao (to Netherlands) | V | Extant | ||||
| Denmark | V | Extant | ||||
| Dominica | V | Extant | ||||
| Dominican Republic | N | Extant | Yes | |||
| Faroe Islands (to Denmark) | V | Extant | ||||
| Finland | V | Extant | ||||
| France | V | Extant | ||||
| Germany | V | Extant | ||||
| Grenada | N | Extant | Yes | |||
| Guadeloupe (to France) | N | Extant | Yes | |||
| Guatemala | N | Extant | Yes | |||
| Haiti | N | Extant | Yes | |||
| Honduras | N | Extant | Yes | |||
| Iceland | V | Extant | ||||
| Ireland | V | Extant | ||||
| Jamaica | N | Extant | Yes | |||
| Japan | V | Extant | ||||
| Martinique (to France) | V | Extant | ||||
| Mexico | N | Extant | Yes | |||
| Morocco | V | Extant | ||||
| Netherlands | V | Extant | ||||
| Nicaragua | N | Extant | Yes | |||
| Norway | V | Extant | ||||
| Panama | N | Extant | Yes | |||
| Poland | V | Extant | ||||
| Portugal | V | Extant | ||||
| Puerto Rico (to USA) | N | Extant | Yes | |||
| Sint Maarten (to Netherlands) | V | Extant | ||||
| Spain | V | Extant | ||||
| St Barthelemy (to France) | N | Extant | Yes | |||
| St Kitts and Nevis | V | Extant | ||||
| St Lucia | V | Extant | ||||
| St Martin (to France) | V | Extant | ||||
| St Pierre and Miquelon (to France) | N | Extant | Yes | |||
| St Vincent and the Grenadines | N | Extant | Yes | |||
| Sweden | V | Extant | ||||
| Switzerland | V | Extant | ||||
| Trinidad and Tobago | N | Extant | Yes | |||
| Turks and Caicos Islands (to UK) | N | Extant | Yes | |||
| United Kingdom | V | Extant | ||||
| USA | N | Extant | Yes | Yes | Yes | |
| Venezuela | N | Extant | Yes | |||
| Virgin Islands (to UK) | N | Extant | Yes | |||
| Virgin Islands (to USA) | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|---|
| Bahamas | Grog Pond |
| Canada | Codroy Valley Estuary |
| Canada | Long Point Peninsula and Marshes |
| Canada | Greater Rondeau Area |
| Canada | Matchedash Bay |
| Canada | Wolfe Island |
| Canada | Wildwood Gull Roost |
| Canada | Île de l'Est |
| Canada | Marais de Saint-Timothée |
| Canada | Marais de Saint-Étienne |
| Canada | Canal de Beauharnois |
| Canada | Cumberland Marshes |
| Bahamas | San Andros Pond |
| Bahamas | Southern Great Lake |
| Virgin Islands (to USA) | Southgate and Green Cay |
| Jamaica | Black River Great Morass |
| USA | Catahoula-Dewey Wills-Three Rivers |
| USA | Chenier Plain |
| USA | Lake Mattamuskeet - Swan Quarter |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Wetlands (inland) | Bogs, Marshes, Swamps, Fens, Peatlands | suitable | non-breeding |
| Wetlands (inland) | Bogs, Marshes, Swamps, Fens, Peatlands | suitable | breeding |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | major | non-breeding |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | major | breeding |
| Altitude | Occasional altitudinal limits |
| Purpose | Primary form used | Life stage used | Source | Scale | Level | Timing |
|---|---|---|---|---|---|---|
| Pets/display animals, horticulture | - | - | International | Non-trivial | Recent |
Recommended citation
BirdLife International (2023) Species factsheet: Aythya collaris. Downloaded from
http://www.birdlife.org on 30/03/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 30/03/2023.
