Green-backed Hillstar
Urochroa leucura
The green-backed hillstar is 13 to 14 cm (5.1 to 5.5 in) long including its approximately 3 cm (1.2 in) bill. It weighs about 8.7 g (0.31 oz). The sexes are alike, though the female is somewhate duller than the male. They have bronzy green upperparts with bronzy uppertail coverts, an iridescent blue throat and breast, and a dull gray belly. Their central tail feathers are bronzy and the others white with dusky gray outer edges. Juveniles are similar to adults with the addition of buffy fringes on the head feathers and a slight buffy malar streak. Voice: What is thought to be the green-backed hillstar's song is "a continuous series of single 'tseee', 'tsing' or 'seeuw' notes". It also makes "a liquid 'twit', repeated in long sequences.
ID text from Wikipedia, CC BY-SA 4.0
Rufous-gaped Hillstar
Urochroa bougueri
The rufous-gaped hillstar is 13 to 14 cm (5.1 to 5.5 in) long including its approximately 3 cm (1.2 in) bill. It weighs 8.5 to 12.5 g (0.30 to 0.44 oz). The sexes are alike. They have a long, straight, black bill and coppery green upperparts. The English name comes from the rufous-cinnamon malar streak on the face. The throat and breast are iridescent blue and the belly dull gray. The central and outermost tail feathers are black and the rest white with dusky gray edges. Juveniles are similar to adults with the addition of buffy fringes on the head feathers.
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: Green-backed Hillstar and Rufous-gaped Hillstar.