The Black-bellied Hummingbird (Eupherusa nigriventris) inhabits in Costa Rica and Panama. Its home is in wet forests of lower middle elevations, males mostly in canopy, and females descend to shrub level along edges and at gaps. Adults are 8 cm (3 inches) in height and 3.4 g in weight.
Its forecrown, face, and underparts are velvety black, with white crissum. Above is bronzy-green, duskier on central retrices, and secondaries rufous, tipped with black. Bill black, and feet dusky-flesh. Feeds on flowers of trees and epiphytes.