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

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 ...

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 ...