Semper's Warbler Leucopeza semperi

Family: Parulidae (New World warblers)

Authority: Sclater, 1877

Red List Category

Criteria: D

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Justification of Red List category
This species has not been recorded with certainty since 1961, and there are few records from the 20th century despite being apparently more abundant before then. It may have been driven extinct by introduced mongooses, perhaps compounded by habitat loss. However, it possibly remains extant because some suitable habitat remains, searches have not been adequately extensive, and there have been a number of possible or tentative sightings. A tiny population is assumed to remain and therefore it is treated as Critically Endangered.

Population size: 1-49 mature individuals

Population trend: unknown

Extent of occurrence (breeding/resident): 1 km2

Country endemic: yes

Land-mass type - oceanic island
Realm - Neotropical
IUCN Ecosystem -- Terrestrial biome

Recommended citation
BirdLife International (2024) Species factsheet: Leucopeza semperi. Downloaded from on 24/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from on 24/02/2024.