Steely-vented Hummingbird

The steely-vented hummingbird is 8 to 11 cm (3.1 to 4.3 in) long and weighs about 4.4 to 5.0 g (0.16 to 0.18 oz). Both sexes of all subspecies have a black bill with a pinkish or reddish base to the mandible. Adult males of the nominate subspecies have golden-green upperparts with blue-black uppertail coverts. Their tail is also blue-black. Their underparts are dark glittering golden-green with greenish to steel blue undertail coverts. Adult females have some white on their throat feathers and grayish-brown undertail coverts. Voice: The steely-vented hummingbird's song has not been described in words. Its calls have been described as "a high, sharp tsit or dry chit, sometimes uttered in sputtering series."