Family: Alcidae (Auks)

Authority: Xántus de Vesey, 1860

Red List Category

Criteria: B2ab(iv,v)

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

Population size: 5000 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 469,000 km²

Country endemic: yes