Scaly-breasted Hummingbird
Phaeochroa cuvierii
The scaly-breasted hummingbird is 11.5 to 13 cm (4.5 to 5.1 in) long and weighs about 8 to 10 g (0.28 to 0.35 oz). All of the subspecies except P. c. roberti have a mostly black bill with a pink base to the mandible; roberti's is all black. Males and females of all subspecies have the same plumage but females have a longer bill. The nominate subspecies P. c. cuvierii is the smallest and palest subspecies. It is mostly bronzy green with a grayish buff belly. The feathers of the underparts have buffy edges that give a scaly appearance. Voice: The scaly-breasted hummingbird's song is "a loud, variable, continuous warble...a mix of chips, sharp squeaks and short trills or sputters". During chases it makes "a high-pitched descending trill" and other calls include "a repeated short burry 'trrk', wet 'tlek', and a more emphatic 'chick'."
ID text from Wikipedia, CC BY-SA 4.0
Steely-vented Hummingbird
Saucerottia saucerottei
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."
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Scaly-breasted Hummingbird and Steely-vented Hummingbird.