Family Hummingbirds (Trochilidae)

Least Concern

Buff-thighed Puffleg (Haplophaedia assimilis)


French: Érione à pattes rousses German: Fahlschenkel-Höschenkolibri Spanish: Calzadito verdoso sureño

Eriocnemis assimilis


, 1876,

Apolo and Tilotilo, La Paz, Bolivia


Closely related to H. aureliae; these two usually considered conspecific, but considerable plumage differences support their treatment as separate species. Two subspecies recognized.

Subspecies and Distribution
  • H. a. affinis (Taczanowski, 1884) – E slope of Andes of N & C Peru (Amazonas S to Huánuco; also Cerros del Sira#R#R).
  • H. a. assimilis (Elliot, 1876) – E slope from S Peru (Cuzco) to C Bolivia (Cochabamba).
  • Descriptive notes

    9–10 cm; 5–6 g. Sexes alike. Bill blackish and straight. Entire plumage dark green, leg puffs in both sexes pale creamy buff to whitish; tail slightly forked,... read more


    Presumed song a repeated single strident note “tsuk...tsuk...tsuk...” at a rate of c. 1·5–2 notes/... read more


    Undergrowth of humid and wet pre-montane forest and forest borders from 1500 m to 3000 m altitude,... read more

    Food and feeding

    Territorial. Usually low at small groups of flowers; feeding territories are usually centred on a few flowering bushes. Insects are gleaned... read more


    Clutch two white eggs; incubation by female. No information on nest construction or breeding season available, but probably as in H.... read more


    Probably disperses seasonally to lower temperate zone.

    Status and conservation

    Not globally threatened. CITES II. Appears to be generally fairly common, though no precise data available. Race affinis known only from a few localities in Peru,... read more

    Recommended citation

    Heynen, I. & Boesman, P. (2020). Buff-thighed Puffleg (Haplophaedia assimilis). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 21 February 2020).