Amherst College Department of Biology
Amherst College Department of Environmental Studies
Journey North Migration Tracker
Hummingbirds: Magic in the Air (PBS Nature film by Ann Prum)
American Association for the Advancement of Science
American Society of Naturalists
American Ornithological Society
Association for Tropical Biology and Conservation
https://www.austinrealestate.com/fun-facts-about-hummingbirds-in-texas.php