Family: Alcidae (Auks)

Authority: (Gmelin, 1789)

Red List Category

Criteria: A2bce+3bce+4bce

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Justification of Red List category
This species is still abundant, but it is treated as Endangered because its population is estimated to have undergone a very rapid reduction, especially in the southern portion of its range, which is expected to continue, owing to a variety of threats.

Population size: 240000-280000 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 4,790,000 km²

Country endemic: no

Attributes
Land-mass type - continent
Land-mass type - oceanic island
Land-mass type - shelf island
Realm - Nearctic
IUCN System - Freshwater
IUCN System - Marine
IUCN System - Terrestrial
USFWS - Bird of Conservation Concern