This small hummingbird is endemic to the highlands of Costa Rica. The adult male's copper-colored crown and tail, with white outer tail feathers, are useful field marks.
The adult male is mostly green, with a coppery crown, uppertail-coverts, and central tail feathers. The outer tail feathers are white, and the bill curves downward. The species is reported at about 7.5 cm long.
It uses evergreen montane forest and forest edges in Costa Rica, recorded at 700–1,500 m. Nectar is its main food.
An extinction-risk assessment has not been added yet.