Photo Credit: Gabrielle Kuholski
A male Anna's hummingbird perches on a volunteer's hand before flying away. Hummingbirds get that iridescent color from a melanin pigment. It is in the feather platelets that include air bubbles, which act like prisms giving off that metallic look to the feathers.
Page last updated Fri March 29th, 2013 at 00:00