In general, the more diversified the parts, the more diversified are the communities of fishes which live in the area. All of these. The eagle usually visits in winter when the river is free of ice, while swans and loons stop for a rest during migration. All of these. The Niagara River is an important overwintering habitat for various duck species including the canvasback.
Fish gills take oxygen from the water as it passes over the gills.
To give information on which species of sport fish are unsafe to eat. Fish are exposed to contaminants in their habitats and in their food. In general, larger fish have been exposed to more contaminants and their consumption may be restricted. Wetlands are the most productive aquatic habitats. They provide habitat for fish, birds, mammals, amphibians and reptiles.