Bird, Mammal, and Fish Species along the Niagara River

The Niagara River supports hundreds of fish, amphibian, reptile, bird, and mammal species, many of them rare or at risk. It has one of the most diverse freshwater fish populations in Canada, with at least 94 identified species, because Niagara lies at the northern limit for many warm-water fish and the southern limit for many cold-water species. Niagara Falls also acts as a natural barrier to fish migration, making the area an east-west limit for many marine animals. Efforts by agencies and groups to improve water quality and habitat conditions have helped beavers, river otters, and minks return to this ecosystem, where they have begun to thrive despite the river's swift currents. The Niagara Gorge is also internationally known for having the highest number of gull species ever spotted in one location, with 19 species recorded. During fall and spring migrations, more than 100,000 gulls and terns rest and feed there because of the ice-free waters and abundant food supply. For this reason, the Niagara Gorge is designated an internationally important Bird Area, recognized as critical to bird populations for nesting sites, migration stopovers, flyways, and overwintering habitat.

Ontario · Canada