Black-breasted Hillstar

The black-breasted hillstar is 13 to 14 cm (5.1 to 5.5 in) long and weighs about 8.4 g (0.30 oz). Adults have a medium length slightly decurved black bill. The male's upperparts are bronzy brown. It has a shining emerald green gorget, grayish brown flanks, and entirely black breast, belly, and vent area. The tail is slightly forked and blue-black. The female is dull bronzy brown above and below. Its throat is pale with fine dark speckles. The tail is greenish black and the outer three or four pairs of feathers are white at their tips. Voice: The black-breasted hillstar's vocalizations are not well known, but it makes a "fast squeaky twittering with rising and falling sequences" when chasing.