Nihoa Finch Telespiza ultima

Family: Fringillidae (Finches)

Authority: Bryan, 1917

Red List Category

Criteria: B1ac(iv)

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Justification of Red List category
This species is listed as Critically Endangered because it has an extremely small range, restricted to one island, where the population exhibits marked population fluctuations, probably owing to climatic events. The accidental introduction of mammalian predators, non-native pest plants, insects or an avian disease, or a stochastic event such as a hurricane could rapidly bring about its extinction.

Population size: 2400-3600 mature individuals

Population trend: stable

Extent of occurrence (breeding/resident): 2 km2

Country endemic: yes

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

Recommended citation
BirdLife International (2024) Species factsheet: Telespiza ultima. Downloaded from on 01/03/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from on 01/03/2024.