Family: Alcidae (Auks)

Authority: (Green and Arnold, 1939)

Red List Category

Criteria: B2ab(iv,v)

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Justification of Red List category
This newly split species is listed as Vulnerable because it occupies a small range when breeding, nesting on only a few islands and islets, and is inferred to be in on-going decline owing mainly to the impacts of invasive mammalian predators. If it is found to be breeding at more than 10 locations, the species may warrant downlisting to a lower threat category.

Population size: 10000-19999

Population trend: Decreasing

Extent of occurrence (breeding/resident): 217,000 km²

Country endemic: No