White-bearded Hermit

The white-bearded hermit is about 13 to 14 cm (5.1 to 5.5 in) long and weighs 4 to 6 g (0.14 to 0.21 oz). This medium-sized hermit has bronzy green upperparts with gray margins on the uppertail coverts. The underparts are gray. The face has a black "mask" with a white supercilium and malar stripe; the center of the throat has a white stripe. The female has identical plumage but shorter wings and a shorter and more decurved bill than the male.

The white-bearded hermit is found in Amazonia, from the Andean foothills of western and southern Venezuela south through eastern Colombia, Ecuador, and Peru to northeastern Bolivia, and east throughout western Amazonian Brazil. In elevation it usually ranges as high as 850 m (2,800 ft) but has been recorded up to 1,200 m (3,900 ft) in Peru. It is a bird of humid landscapes. In the lowlands it mostly inhabits regularly inundated areas, such as along rivers and in várzea forest. At higher elevations if favors gallery forest in the cerrado and llanos.

The white-bearded hermit is a "trap-line" feeder like other hermit hummingbirds, visiting a circuit of a wide variety of flowering plants for nectar. It also consumes small arthropods.