Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species is considered Near Threatened as it has a restricted breeding range, with more than 90% of the breeding population being restricted to a
single island. It is also subject to large population fluctuations in response to climatic effects, and could be negatively affected by climate change, human intrusions and overfishing.
Distribution size (breeding/resident):
Land-mass type - continent - Continents are land masses > bigger than Australia (=7,682,300 sq km).
Realm - Nearctic - realm
Realm - Neotropical - realm
IUCN Ecosystem -- Marine biome