|Scientific Name:||Aythya collaris (Donovan, 1809)|
|Taxonomic Source(s):||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.|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Reviewer(s):||Butchart, S. & Symes, A.|
|Facilitator/Compiler(s):||Ekstrom, J., Butchart, S.|
This species has an extremely 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 extremely 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.
|Previously published Red List assessments:|
Native:Anguilla; Antigua and Barbuda; Aruba; Bahamas; Barbados; Belize; Bermuda; Canada; Cayman Islands; Colombia; Costa Rica; Cuba; Dominica; Dominican Republic; Grenada; Guatemala; Haiti; Honduras; Martinique; Mexico; Montserrat; Nicaragua; Panama; Puerto Rico; Saint Barthélemy; Saint Kitts and Nevis; Saint Lucia; Saint Pierre and Miquelon; Saint Vincent and the Grenadines; Trinidad and Tobago; Turks and Caicos Islands; United States; Venezuela, Bolivarian Republic of; Virgin Islands, British; Virgin Islands, U.S.
Vagrant:Algeria; Austria; Belgium; Cape Verde; Denmark; Faroe Islands; Finland; France; Germany; Guadeloupe; Iceland; Ireland; Jamaica; Japan; Morocco; Netherlands; Norway; Poland; Portugal; Spain (Canary Is.); Sweden; Switzerland; United Kingdom
|Range Map:||Click here to open the map viewer and explore range.|
|Current Population Trend:||Increasing|
|Citation:||BirdLife International. 2016. Aythya collaris. The IUCN Red List of Threatened Species 2016: e.T22680370A92859350.Downloaded on 21 February 2018.|
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