Oahu Elepaio Chasiempis ibidis

Family: Monarchidae (Monarch-flycatchers)

Authority: Stejneger, 1988

Red List Category

Criteria: C2a(i)

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Justification of Red List category

This species has a very small population size that is inferred to be declining primarily owing to nest predation by Black Rats, with no subpopulation exceeding 1,000 mature individuals. It is therefore assessed as Vulnerable.

Population size: 1261 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 675 km2

Country endemic: yes

IUCN Ecosystem -- Terrestrial biome
Land-mass type - oceanic island
Realm - Oceanic
USFWS - Bird of Conservation Concern

Recommended citation
BirdLife International (2024) Species factsheet: Chasiempis ibidis. Downloaded from on 20/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from on 20/02/2024.