CR
Medium Tree-finch Geospiza pauper



Family: Thraupidae (Tanagers)

Authority: (Ridgway, 1890)

Red List Category

Criteria: B1ab(v)

Click here for more information about the Red List categories and criteria

Justification of Red List category
This species qualifies as Critically Endangered as it has a very small range on a single island, and recent information suggests that it is declining rapidly owing to the effects of the dipterid parasite Philornis downsi.



Population size: 600-1700 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 30 km2

Country endemic: yes

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

Recommended citation
BirdLife International (2024) Species factsheet: Geospiza pauper. Downloaded from https://datazone.birdlife.org/species/factsheet/medium-tree-finch-geospiza-pauper on 19/03/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 19/03/2024.