A small, greenish hummingbird with a very short bill, the Rufous-capped Thornbill can be found on the eastern slopes in the Andes in Peru, Bolivia, and Ecuador. Males are easily recognizable with their bright, rufous crown and narrow, iridescent-green gorget. Not much is known about the behavior and biology of this species in part because its main habitat consists of impenetrable mountain slopes and forests. Mainly nectivorous, this species has also been known to take small insects. The Rufous-capped Thornbill seems less affected by human disturbance than other species in the genus Chalcostigma and has not been placed on any threatened species lists.