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ForestCup nestTiny · 3 g
ID tip
The black-bellied thorntail weighs about 3.2 g (0.11 oz). Males are 12 to 13.7 cm (4.7 to 5.4 in) long and females 7.4 to 7.6 cm (2.9 to 3.0 in). Adults of both sexes of the nominate subspecies have an iridescent emerald green crown and coppery green upperparts with a white band across the rump. The male's gorget is iridescent emerald green with a golden coppery band below it. Its flanks are bronzy green and the rest of the underparts black. The tail inner feathers of the tail are steely blue and the outer three pairs gray; all have white shafts.
Text from Wikipedia, licensed CC BY-SA 4.0.
When to see the Black-bellied Thorntail
One bar for each month, and every month is filled: this bird is recorded here in all twelve. The wide bar is October, the month with the most records.
Where to see the Black-bellied Thorntail
The map shades 4 countries with regular records, and 2 more in a lighter tone where the bird turns up only as a stray. Everything unshaded has no records. Countries are listed below the map.
About the Black-bellied Thorntail
The black-bellied thorntail is a species of hummingbird in the "coquettes", tribe Lesbiini of subfamily Lesbiinae. It is found in Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela.
Text adapted from Wikipedia, licensed CC BY-SA 4.0.
Easily confused with
Racket-tipped ThorntailDiscosura longicaudusMale racket-tipped thorntails are 10 to 12 cm (3.9 to 4.7 in) long and females about 8 to 10 cm (3.1 to 3.9 in).
Letitia's ThorntailDiscosura letitiaeGraves described the specimens of Letitia's thorntail, but noted that the perceived colors of hummingbirds depend on the lighting and the observer's angle of view.
Wire-crested ThorntailDiscosura popelairiiThe wire-crested thorntail is one of the smallest birds on Earth, with a mature weight of about 2.5 g (0.088 oz).
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