The Rivoli's hummingbird is a striking, shimmery flier. Learn how to identify these gorgeous birds and why their name was changed... twice!

The male Allen’s hummingbird has warm rusty-orange flanks, breast band, face, neck, and tail, as well as a green back and crown. They often have a rusty-orange rump, and sometimes show rusty ...

their uppertail coverts and tail base have more rufous (adult female rufous can be all-green); and their chip calls are slightly lower pitched. Also see female and immature calliope hummingbird ...

Hummingbirds, fondly referred to as “hummers ... showing the bird’s shimmering green back and the ruby-red throat patch that gives the species its name, set against a vivid green background ...