The site was identified as important in 2016 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|
|Slaty-backed Gull Larus schistisagus||LC||breeding||2012||min 22,370 individuals||A4i|
|A4iii Species group - seabirds||n/a||breeding||2004||min 10,000 breeding pairs||A4iii|
The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2016).
|Habitat (IUCN level 1)||Habitat detail||Extent (% of site)|
BirdLife International (2023) Important Bird Area factsheet: Signal'nyy Island. Downloaded from http://datazone.birdlife.org/site/factsheet/signalnyy-island-iba-russia-(asian) on 22/09/2023.