Ontario Field Naturalist's ToolchestOnline News
Bird Studies Canada News
Time for Nature -- Stories About Canada's Natural Hertitage
EnviroZine, Environment Canada's Online Newsmagazine
BirdForum: Live Bird News from around the world (Mostly from England) [Sign up may be required]
Birder's World Community: Birds in the News [Sign up may be required]
Science Daily Excellent site for nature news from around the world.  Can be diviided into categories.
American Naturalist
Nature magazine for Manitoba

Ontario Nature
Ontario Field Ornithologists
National Audubon Society
Birder's World