Black-bellied Hummingbird
Eupherusa nigriventris
The black-bellied hummingbird is 7 to 8 cm (2.8 to 3.1 in) long and weighs about 3.0 to 3.5 g (0.11 to 0.12 oz). Males have a black breast and belly that provide the species' English name; their forehead and face are also black. The sides of the breast are green and the undertail coverts white. They have mostly bronze green upperparts with narrow black edges on the crown feathers and dull bronze uppertail coverts. Their central tail feathers are dull black with a bronze gloss and the outer ones white. The female has grayish white underparts with white undertail coverts. Voice: The black-bellied hummingbird's song is "a high, thin, sputtering warble", typically given from perches at the edge of gaps in the forest. Its calls include "a sharp, high-pitched tseep or peet" and "a high, tsittering in chases".
ID text from Wikipedia, CC BY-SA 4.0
Stripe-tailed Hummingbird
Eupherusa eximia
The stripe-tailed hummingbird is 9 to 10.5 cm (3.5 to 4.1 in) long and weighs an average of 4–4.5 g (0.14–0.16 oz). Both sexes of all subspecies have a straight black bill. The nominate male has bright metallic grass green upperparts that is more bronzy on the uppertail coverts. Cinnamon rufous secondaries show as a patch on the folded wing. Its three inner pairs of tail feathers are dark bronze green; the outer two pairs have black outer webs and white inner ones with black tips, giving the species its English name. Its underparts are bright metallic grass green with white undertail coverts. Voice: The stripe-tailed hummingbird's song is "1-3 squeaky, sometimes metallic notes, then a low, dry, insectlike trill, then 1-3 more squeaks". Its calls include "a liquid, rattling trill", a "sharp, piercing peet or bzeet", and "a sharp buzz".
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: Black-bellied Hummingbird and Stripe-tailed Hummingbird.