Ecuador is home to more hummingbird species than any other place on Earth. The Endangered Black-breasted Puffleg is one of the most rare, found only in the high, humid montane forests hugging the ridges around Pichincha volcano in northwestern Ecuador. It is estimated that the remaining number of mature individuals is 150 or fewer. Since 2002, Rainforest Trust and Fundación Jocotoco have worked to establish and expand the Yanacocha Reserve, where the majority of limited sightings of this shy bird have occurred.