NT
Ferruginous Duck Aythya nyroca



Family: Anatidae (Ducks, Geese, Swans)

Authority: (Güldenstädt, 1770)

Red List Category

Criteria: A2cd+3cd+4cd

Click here for more information about the Red List categories and criteria

Justification of Red List category
Given that this species's range may fluctuate considerably from year to year - particularly in Asia - owing to changing water levels, it is very hard to estimate the global population or trends. There have been rapid declines in Europe, but evidence of declines in the larger Asian populations is sparse and sometimes contradictory. The species is currently listed as Near Threatened as it is suspected to be undergoing a moderately rapid overall decline; evidence of rapid declines in Asia would qualify the species for uplisting to Vulnerable, but conversely evidence of stability could lead to its downlisting to Least Concern.



Population size:

Population trend: Decreasing

Extent of occurrence (breeding/resident): 25,900,000 km2

Country endemic: No

Attributes
Land-mass type - continent
Realm - Afrotropical
Realm - Indomalayan
Realm - Palearctic
IUCN Ecosystem -- Freshwater biome
IUCN Ecosystem -- Terrestrial biome
IUCN Ecosystem -- Marine biome

Recommended citation
BirdLife International (2017) Species factsheet: Aythya nyroca. Downloaded from http://www.birdlife.org on 14/12/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 14/12/2017.