NT
Cassin's Auklet Ptychoramphus aleuticus



Family: Alcidae (Auks)

Authority: (Pallas, 1811)

Red List Category

Criteria: A2b+3b+4b

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

Justification of Red List category
This species has been uplisted to Near Threatened because the global population decline is likely to approach 30% in three generations (23 years). If the decline is found to be larger, the species would qualify for further uplisting.

Population size: 3600000

Population trend: Decreasing

Extent of occurrence (breeding/resident): 8,620,000 km2

Country endemic: No

Attributes
Realm - Nearctic
IUCN Ecosystem -- Marine biome

Recommended citation
BirdLife International (2019) Species factsheet: Ptychoramphus aleuticus. Downloaded from http://www.birdlife.org on 23/01/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/01/2019.