Confined to Peru and northwest Bolivia, the Buff-thighed Puffleg is a distinctive bird, if seen well. Both sexes are largely green with a slightly forked blue-black tail, with the most distinctive feature being the creamy-buff to whitish leg ‘puffs’. These are rufous in the southern Peruvian and Bolivian subspecies. The Buff-thighed Puffleg inhabits humid pre-montane forests and their borders, at altitudes between 1500 and 3000 m, and usually confines its activities to a relatively small area of flowering plants, which constitutes its territory. It is sometimes considered to form a superspecies with the Greenish Puffleg (Haplophaedia aureliae) of the northern Andes.