You’ve probably heard about geese, whales, and buffalo migrating due to extreme weather changes or to find food for their ...

An Anna's Hummingbird adult male hovering and feeding yhelfman/Getty Images. While there are more than 360 species of hummingbirds, only one—the ruby-throated hummingbird—breeds and raises its ...

Despite its tiny stature, the smallest bird native to North America can survive cold nights in the Rocky Mountains, and some ...

The ruby-throated hummingbird is one of a dozen species which breed and spend summers in the U.S. and Canada, but the only species whose habitat is east of the Mississippi River.

The ruby-throated hummingbird is one of a dozen species which breed and spend summers in the U.S. and Canada, but the only species whose habitat is east of the Mississippi River.

The ruby-throated hummingbird is one of a dozen species which breed and spend summers in the U.S. and Canada, but the only species whose habitat is east of the Mississippi River.

Hummingbirds have started to arrive in the Rockford region. ... Many of the tiny birds will settle in northern Illinois and others will keep pushing north as far as Canada.

The ruby-throated hummingbird is one of a dozen species which breed and spend summers in the U.S. and Canada, but the only species whose habitat is east of the Mississippi River.

The ruby-throated hummingbird is one of a dozen species which breed and spend summers in the U.S. and Canada, but the only species whose habitat is east of the Mississippi River.

The ruby-throated hummingbird is one of a dozen species which breed and spend summers in the U.S. and Canada, but the only species whose habitat is east of the Mississippi River.

The ruby-throated hummingbird is one of a dozen species which breed and spend summers in the U.S. and Canada, but the only species whose habitat is east of the Mississippi River.