Socorro Mockingbird Mimus graysoni

Family: Mimidae (Mockingbirds and thrashers)

Authority: (Lawrence, 1871)

Red List Category

Criteria: B1ab(ii,iii)

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Justification of Red List category
Past intensive sheep-grazing and ongoing persistent locust swarms have dramatically reduced and degraded the available habitat for this species. Combined with cat predation, which effectively removes mockingbirds from areas with little or no understorey, declines in its extremely small range are considered likely. Sheep eradication appears to have led to the population trend stabilising, but despite this and ongoing cat eradication, the species has not yet expanded its range. Therefore, it is listed as Critically Endangered.

Population size: 190-280 mature individuals

Population trend: stable

Extent of occurrence (breeding/resident): 50 km2

Country endemic: yes

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

Recommended citation
BirdLife International (2023) Species factsheet: Mimus graysoni. Downloaded from on 05/12/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from on 05/12/2023.