Stunning medium-sized hummingbird. Male shows bright purple throat, blue crown, and white line behind eye. Female not quite as colorful but still striking: bright buffy underparts with black cheek and white line behind eye. She is very similar to female White-bellied Mountain-gem but has greener tail; only safely identified with a good view. A forest hummingbird of middle elevations that also comes out to edges and gardens, visits feeders.