SCIENTIFIC NAME: Discosura langsdorffi
The Black-Bellied Thorntail is a slow flying species of hummingbird in the family Trochilidae.
Males are about 5 inches in length and females are about 3 inches in length.
Both sexes are dark green above with a white band across the rump.
Males are iridescent emerald green with a black belly, bold white rump band, short crest, and long, straight tail feathers.
Females are similar, but are duller below with a shorter tail.
Compared to the similar Festive Coquette, females have darker plumage.
The male will attract the female by fanning out their tail and zooming side-to-side with a loud cracking sound.
Generally, they'd only make a quick “tsip” or “chip” noise when feeding.
This species has a knack for stealing nectar from flowers in other hummingbird territories.
Alongside nectar from flowering plants it will hunt for arthropods.
Subtropical or tropical moist lowland forest and heavily degraded former forest at about a 100-300m altitude.
Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela.
They construct a cup-shaped nest from soft down.