Mangrove Finch Geospiza heliobates

Family: Thraupidae (Tanagers)

Authority: (Snodgrass & Heller, 1901)

Red List Category

Criteria: B1ab(ii,iii,v); C2a(i,ii); D

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Justification of Red List category
This species has an extremely small, severely fragmented range, and only two viable subpopulations. Recent surveys suggest that the number of locations and mature individuals are both declining significantly, and consequently it qualifies as Critically Endangered.

Population size: 20-40 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 16 km2

Country endemic: yes

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

Recommended citation
BirdLife International (2023) Species factsheet: Geospiza heliobates. Downloaded from on 03/12/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from on 03/12/2023.