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The site was identified as internationally important for bird conservation in 2012 because it was regularly supporting significant populations of the species listed below, meeting IBA criteria.

Populations meeting IBA criteria ('key species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Aleutian Tern Onychoprion aleuticus	VU	breeding (1974–2009)	1,720 individuals	A4i

Year	Protected Area	Designation (management category)	% coverage of IBA
1978	Copper River Delta	Critical Habitat Area (V)	75
1999	Copper River Delta Megasite Fee	Private Conservation Land (V)	<1

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Recommended citation
BirdLife International (2025) Important Bird Area factsheet: East Copper River Delta Colonies (USA). Downloaded from https://datazone.birdlife.org/site/factsheet/east-copper-river-delta-colonies-iba-usa on 13/01/2025.