Buff-tailed Coronet
Boissonneaua flavescens
The buff-tailed coronet is 11 to 12 cm (4.3 to 4.7 in) long and weighs 7.3 to 8.8 g (0.26 to 0.31 oz). Both sexes have a short, straight, black bill and a small white spot behind the eye. Males of the nominate subspecies are mostly shining green, with a buff belly accented by green spots. The underwing coverts are cinnamon and show in flight. The central tail feathers are bronzy and the rest are buff with bronze tips and edges. It has small white tufts on the legs. The nominate female has more buff on the underparts and the bronze of the tail is less extensive. Voice: What is thought to be the buff-tailed coronet's song is "a continuous series of single high-pitched 'tsit' notes." It sometimes sings with several others of its species nearby. It also makes a "squeaky twittering, with rising piping notes and stuttering rattles," especially when interacting with other hummingbirds.
ID text from Wikipedia, CC BY-SA 4.0
Chestnut-breasted Coronet
Boissonneaua matthewsii
The chestnut-breasted coronet is 10.5 to 13 cm (4.1 to 5.1 in) long and weighs about 6.5 to 8.3 g (0.23 to 0.29 oz). Both sexes have a short, straight, black bill, a white spot behind the eye, and a notched tail. Males have metallic green upperparts. Their throat has yellowish green speckles on a buff base and the rest of the underparts are reddish chestnut with some green speckles on the flanks. The central tail feathers are bronzy and the rest reddish chestnut with bronzy tips. The female's plumage is almost identical, but with somewhat paler underparts and less speckling on the throat. Voice: One description of chestnut-breasted coronet vocalizations is "a high, thin, liquid tip, a rapid, sweet trill, and various squeaky notes."
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
Learn this pair in the BeakBrain App
Photo and call practice. Coming soon to iPhone and Android.
Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Buff-tailed Coronet and Chestnut-breasted Coronet.