The Black-breasted Puffleg (Eriocnemis nigrivestis) is an average sized (8.5 cm in length) species of hummingbird endemic to Ecuador. It has a very restricted range, being found only on the Northwestern slopes of the Pichincha volcano and it is critically endangered. On the 23rd of June, 2005 this bird was adopted as the emblem of the city of Quito, which, being just on the other side of the volcano, is very close to where the last populations of the species are found.