We have used a variety of sources to provide you with valuable information on this site. This is a space to recognize and thank all the authors.
Cornell Lab of Ornithology, All About Birds
Audubon, Audubon at Home.
USGS, Breeding Bird Survey.
What Bird, Birds of North America, 2004
Bird Watcher's Digest Magazine, Bird Watcher's Digest
hummingbirds.net, Hummingbird Migration Maps
The Hummingbird Society, Hummingbird Species at Risk of Extinction.