Белогузый колибри Chalybura buffonii

Medium-sized hummingbird, male mostly green with turquoise tones. Female green above and gray below. On both sexes, note contrasting white undertail coverts to distinguish from other hummingbirds. Most similar to Bronze-tailed Plumeleteer, but tail dark blue-black, not bronzy. Usually seen singly at flowers in forest, edges, or shrubby second growth. Rarely visits feeders.