Dusky Tetraka Crossleyia tenebrosa

Family: Bernieridae (Tetrakas)

Authority: (Stresemann, 1925)

Red List Category

Criteria: B1ab(i,ii,iii,v)

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Justification of Red List category
The species appears to have a small range which is severely fragmented and continuing to decline in extent, owing to widespread destruction and degradation of its forest habitat. The total population size is unknown but could be small, given the species's apparently very patchy distribution within its range. At present the species is treated as Vulnerable until improved information on its population and distribution becomes available.

Population size: 1500-7000

Population trend: Decreasing

Extent of occurrence (breeding/resident): 16,000 km2

Country endemic: Yes

Land-mass type - shelf island
Realm - Afrotropical
IUCN Ecosystem -- Terrestrial biome

Recommended citation
BirdLife International (2020) Species factsheet: Crossleyia tenebrosa. Downloaded from on 04/06/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from on 04/06/2020.