Black-breasted Puffleg

The black-breasted puffleg (Eriocnemis nigrivestis), known as zamarrito pechinegro in Spanish, is a species of hummingbird native to Ecuador. It is Endangered, with an estimated 100–150 individuals remaining in the wild. == Description == The species reaches a length of 8–9 cm. It is sexually dimorphic, with the male having black upper- and underparts, dark blue tail coverts, and a violet-blue throat and undertail-coverts. The female is bronze-green above, bluish-green on rump and uppertail-coverts, golden-green underparts and a pale blue chin. Both sexes have a straight black bill, a forked tail and white pufflegs, from which the common name is derived. Fledglings are sexually dimorphic similar to adults, but with duller coloring and red-orange color on the lower part of the bill. There is no characteristic vocalization; the species is generally quite silent, but may emit a monotonous and metallic "tseet tseet tseet" when it flies away. Juveniles emit a high-pitched chirp when begging for food. == Distribution and habitat == The black-breasted puffleg is endemic to north-western Ecuador, where it currently appears restricted to the ridge crests of the Pichincha Volcano, the Cordillera de Toisán, Esmeraldas and Imbabura. Based on possible sightings in 1983 and 2010, it may still…