This attractive hummingbird measures about 10cm, which is slightly larger than the more common Glittering-bellied Emerald. It exists only in the far north-east of Argentia and is rare to encounter in the Ibera marshes.
The male has glossy green upperparts and most noticeable is the thick black band running longitudinally from the throat down the centre of the chest. This is bordered by blue near the head and neck whilst flanks are blue/green. The tail is wine coloured and this is most noticeable when the bird is hovering when it fans the tail. The male sometimes has a white vent. The bill is long, black and slightly curved.
The female is quite different with a white chest from chin to vent and a black , sometimes broken, longitudinal line also running from chin to vent. She has glossy green upperparts, lighter than the male and a darker tail although still wine coloured.
Female Black-throated Mango