NT
Cassin's Auklet Ptychoramphus aleuticus



Search terms 

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 then the species could qualify for further uplisting; it almost meets the requirements for listing as threatened under criteria A2b+3b+4b.

Population size: 2500000-4999999 mature individuals

Population trend: Decreasing

Distribution size (breeding/resident): 123,000 km2

Country endemic: No

Attributes
Realm - Nearctic - realm
IUCN Ecosystem -- Marine biome

Recommended citation
BirdLife International (2016) Species factsheet: Ptychoramphus aleuticus. Downloaded from http://www.birdlife.org on 03/12/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 03/12/2016.