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Location Canada, Ontario
Central coordinates 79o 4.19' West  43o 7.26' North
IBA criteria A4i, A4iii
Area 2,800 ha
Altitude 74 - 177m
Year of IBA assessment 2008

Bird Studies Canada/Nature Canada

Site description The Niagara River flows 60 km from Lake Erie to Lake Ontario. In addition to being a major tourist destination, it provides drinking water, recreational fishing, employment, and electrical power to millions of people. The river is bordered by urban areas, industrial developments, and agricultural lands with parkland areas and remnant natural areas being interspersed. For a 15 km stretch downstream from the falls the river flows through a 100 m deep and 1 km wide gorge. The riverine habitats are quite varied, ranging from large lake-like areas, exposed boulder beds, rapids, falls, whirlpools, and stretches with swift currents. Within the gorge, the cliff rim, cliff face, and talus slope communities support one of the highest concentrations of rare plant species in Ontario.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Canvasback Aythya valisineria winter  1997  14,000 individuals  A4i  Least Concern 
Greater Scaup Aythya marila winter  1997  10,000 individuals  A4i  Least Concern 
Larus argentatus winter  1995  20,000 individuals  A4i  Not Recognised 
Ring-billed Gull Larus delawarensis breeding  1998  16,000 breeding pairs  A4i  Least Concern 
Bonaparte's Gull Larus philadelphia passage  1995  100,000 individuals  A4i  Least Concern 
A4iii Species group - waterbirds passage  50,000-99,999 individuals  unknown  A4iii   


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Rivers  -
Coastline Cliffs, rocky shores, islets, freshwater  -

Land use

Land-use Extent (% of site)
tourism/recreation major
urban/industrial/transport major

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Niagara River Corridor. Downloaded from on 17/09/2014

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