Family: Alcidae (Auks)

Authority: (Salvadori, 1865)

Red List Category

Criteria: C2a(ii)

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Justification of Red List category
This species has a small breeding population and the presence of introduced predators on most known and potential breeding islands, along with other associated threats, suggests that numbers are likely to be declining. It consequently qualifies as Vulnerable.

Population size: 8000 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 549,000 km²

Country endemic: yes

Attributes
Land-mass type - shelf island
Realm - Nearctic
IUCN Ecosystem -- Marine biome