Photo: Hummingbird alights on a post

1007 of 1240

This is an Allen's hummingbird, which on average reaches only 3 to 3.5 inches in length. Gerry Matthews took this photo in Los Angeles, Calif.

Do you want your photo of the great outdoors featured on TreeHugger? Join the TreeHugger Photo Pool on Flickr and add your photos to the group!

1007 of 1240

More Slideshows