Costa's hummingbird (Calypte costae) is the second smallest North American species of hummingbird. The back and head are an iridescent green. The adult males possess a flared throat patch; both this and their crown are a brilliant metallic purple. The adult females have a small tuft of violet feathers in the center of the throat, however, only about half possess this; the throats of the remainder are completely white. Because they expend so much energy, the hummingbird must feed constantly. Their diet consists of flower nectar, small insects and pollen. They will consume 2/3 of their weight in a single day. One will never see a hummingbird walk -- their legs are so weak it is easier for them to fly one foot than it is to walk the distance.

By Sandy Thomas