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
Intensive sheep-grazing and a persistent locust swarm are reducing and degrading habitat for this species. Combined with cat predation, which effectively removes mockingbirds from areas with little or no understorey, declines in its very small population and extremely small range are considered likely. Despite sheep eradication and ongoing cat eradication the species has not yet expanded its range. This combination of factors qualifies the species as Critically Endangered.

Population size: 190-280

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 (2018) Species factsheet: Mimus graysoni. Downloaded from on 19/11/2018. Recommended citation for factsheets for more than one species: BirdLife International (2018) IUCN Red List for birds. Downloaded from on 19/11/2018.