The site was identified as important in 2000 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|
|Whooper Swan Cygnus cygnus||LC||breeding||1989||present||B1i|
|Whooper Swan Cygnus cygnus||LC||non-breeding||1989||500 individuals||B1i|
The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2000).
|Protected area (PA)||PA designation||PA area (ha)||Relationship of PA with IBA||Overlap of PA with IBA (ha)|
|Vodopad a r. Chavan'ga||Nature Monument||100||protected area overlaps with site||0|
|Habitat (IUCN level 1)||Habitat detail||Extent (% of site)|
|Wetlands (inland)||Standing freshwater, Water fringe vegetation||-|
BirdLife International (2023) Important Bird Area factsheet: Watershed of the Rivers Strelna and Varzuga. Downloaded from http://datazone.birdlife.org/site/factsheet/watershed-of-the-rivers-strelna-and-varzuga-iba-russia-(european) on 21/09/2023.