VU
Island Scrub-jay Aphelocoma insularis



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Red List Category

Criteria: D2

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Justification of Red List category
This species has been uplisted to Vulnerable because it occupies an extremely small range, being found on only one island, and is susceptible to the arrival of West Nile virus, which has resulted in high mortality in other corvids. This plausible threat could conceivably cause the species to qualify as Critically Endangered or Extinct within one or two generations if adequate intervention is not carried out. Given the limited efficacy of the vaccines available, a stable sub-set of several hundred vaccinated birds would probably be required to safeguard the species from such a fate.

Population size: 2000 mature individuals

Population trend: Stable

Distribution size (breeding/resident): 250 km2

Country endemic: Yes

Attributes
Land-mass type - oceanic island - Oceanic islands are islands or island groups that are <200,000 sq km in size and separated from other land masses by >200 m sea depth. Generally Oceanic islands are islands or island groups that are <200,000 sq km in size and separated from other land masses by >200 m sea depth. Generally they have never been connected to a continental area by a land-ridge, and are volcanic in origin.
Realm - Nearctic - realm
USFWS - Bird of Conservation Concern - Species listed by US Fish and Wildlife Service
IUCN Ecosystem -- Terrestrial biome

Recommended citation
BirdLife International (2016) Species factsheet: Aphelocoma insularis. Downloaded from http://www.birdlife.org on 06/12/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 06/12/2016.