The site was identified as important in 2012 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.Populations meeting IBA criteria ('trigger species'):
|Species||Current IUCN Red List Category||Season||Year(s)||Population estimate at site||IBA criteria met|
|Parakeet Auklet Aethia psittacula||LC||breeding||1974-2009||15,419 individuals||A4ii|
|Least Auklet Aethia pusilla||LC||breeding||1974-2009||564,022 individuals||A4ii|
|Whiskered Auklet Aethia pygmaea||LC||breeding||1974-2009||10,505 individuals||A4ii|
|Crested Auklet Aethia cristatella||LC||breeding||1974-2009||215,214 individuals||A4ii|
The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2012).
|Protected area (PA)||PA designation||PA area (ha)||Relationship of PA with IBA||Overlap of PA with IBA (ha)|
|Aleutian Islands||Wilderness||533,102||protected area is adjacent to site||0|
|Alaska Maritime||National Wildlife Refuge||2,637,840||protected area is adjacent to site||0|
BirdLife International (2023) Important Bird Area factsheet: Gareloi Island Marine. Downloaded from http://datazone.birdlife.org/site/factsheet/gareloi-island-marine-iba-usa on 28/09/2023.