The already small population of this critically endangered hummingbird is likely declining at a rate of 10-19% each decade (BirdLife International 2011). Due to significant deforestation and subsequent habitat loss, few areas in Ecuador still provide an adequate environment for Black-breasted Pufflegs. Found only in northwestern Ecuador, these pufflegs prefer dense vegetation and stunted elfin forests on the tops of flat mountain ridges. They also are seen on grassy or bramble-filled montane slopes, and elsewhere near páramo habitats. Black-breasted Pufflegs most often feed from straight, tubular flowers where they tend to be territorial. Following the breeding season, males sometimes move to higher elevations. Both males and females have striking white leg puffs, and purple gorgets. The male gives a dark appearance overall, while the female is bronzy green above and golden green below with a bluish rump.