Family: Procellariidae (Petrels, Shearwaters)

Authority: (Ridgway, 1884)

Red List Category

Criteria: A3bce+4bce

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Justification of Red List category
This species has a very small breeding range, known from five locations in the main Hawaiian islands, and the future of at least two are in jeopardy (Mauna Loa and West Maui). Radar surveys show that the species is declining rapidly on at least one of the other islands where it breeds (Kaua'i), and declines are probable on other islands too. Therefore, it is assessed as Endangered.

Population size: 7500-16600

Population trend: Decreasing

Extent of occurrence (breeding/resident): 22,000,000 km²

Country endemic: Yes

Attributes
Land-mass type - oceanic island
Realm - Oceanic
Realm - Nearctic
IUCN Ecosystem -- Terrestrial biome
IUCN Ecosystem -- Marine biome