The Rufous-tailed Hummingbird is a medium-sized hummingbird. It has a distinctly rufous-colored tail, from which its named is derived, and a bright pink bill. Like other hummingbirds, it feeds on nectar and small insects. It can be highly territorial over feeding areas. The Rufous-tailed Hummingbird is perhaps the most common species of hummingbird at forest edge and in gardens and cultivated areas from southern Mexico south to northwestern South America.