Coppery emerald

The coppery emerald (Chlorostilbon russatus) is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Colombia and Venezuela.

The male coppery emerald is 8 to 8.5 cm (3.1 to 3.3 in) long and females 7 to 7.5 cm (2.8 to 3.0 in). The species weighs between 3.2 and 3.6 g (0.11 and 0.13 oz). Both sexes have a short, straight, black bill. The male's forehead, crown, and upperparts are shining golden green. Its uppertail coverts are coppery green, and its slightly forked tail is golden coppery. Its underparts are glittering golden green. The female's forehead, crown, upperparts, flanks, and uppertail coverts are coppery green and its underparts are smoky gray. Its tail is also slightly forked; its feathers are greenish coppery and the outer four pairs of feathers have a coppery purple band near the end and pale tips. Immature coppery emeralds are similar to adult females with buffy fringes on the feathers of the head.