Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species is still abundant, but it is treated as Endangered because its population is estimated to have undergone a very rapid reduction, which is expected to continue, owing to a variety of threats.
Distribution size (breeding/resident):
Land-mass type - continent - Continents are land masses > bigger than Australia (=7,682,300 sq km).
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.
Land-mass type - shelf island - Continental islands include all other islands or island groups. Generally they were once part of continents and lie on a continental shelf of < 200 m sea depth.
Realm - Nearctic - realm
IUCN Ecosystem -- Freshwater biome
IUCN Ecosystem -- Marine biome
IUCN Ecosystem -- Terrestrial biome
USFWS - Bird of Conservation Concern - Species listed by US Fish and Wildlife Service