Niagara River Corridor

IBA Criteria

Year of most recent IBA criteria assessment: 2008

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Canvasback Aythya valisineria LC winter 1997 14,000 individuals A4i
Greater Scaup Aythya marila LC winter 1997 10,000 individuals A4i
Bonaparte's Gull Larus philadelphia LC passage 1995 100,000 individuals A4i
Ring-billed Gull Larus delawarensis LC breeding 1998 16,000 breeding pairs A4i
Arctic Herring Gull Larus smithsonianus LC winter 1995 20,000 individuals A4i
A4iii Species group - waterbirds n/a passage - 50,000-99,999 individuals A4iii

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here


IUCN Habitat Habitat detail Extent (% of site)
Wetlands (inland) Rivers -
Coastline Cliffs, rocky shores, islets, freshwater -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
tourism/recreation -
urban/industrial/transport -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Niagara River Corridor. Downloaded from on 26/06/2022.