Black-thighed Puffleg (Eriocnemis derbyi) [XC53629]
by Bernabe Lopez-Lanus from El Bosque, Reserva Zona Alta Rio Quindio, Quindio, Colombia (call)
Black-thighed Puffleg (Eriocnemis derbyi) [XC121459]
by Paul Coopmans from Hotel Termales del Ruiz, Colombia (call)
Subspecies
Closely related to Black-breasted Puffleg (Eriocnemis nigrivestis) and Glowing Puffleg (Eriocnemis vestita). Populations at northern end of range have a slightly longer bill and these were formerly regarded as subspecies longirostris, but variation is clinal.