Description wikipedia

The violet-throated starfrontlet (Coeligena violifer) is a species of hummingbird in the "brilliants", tribe Heliantheini in subfamily Lesbiinae. It is found in Bolivia and Peru and possibly Ecuador. All four subspecies of violet-throated starfrontlet are 13 to 14.5 cm (5.1 to 5.7 in) long. All have long, straight, black bills, with the females' being longer than the males'. Both sexes of all subspecies have a white spot behind the eye. Both sexes have a forked tail, with the male's more deeply indented than the female's. Males of the nominate subspecies weigh 8 to 13 g (0.28 to 0.46 oz) and females 4 to 6 g (0.14 to 0.21 oz). The male's head is blackish blue and the back shining bronzy green. The tail is orange-buff with small bronzy tips. The throat and upper breast are green with an iridescent violet spot on the throat. A thin gray band separates the upper breast from the green lower breast and cinnamon belly. The nominate female has a green head, a buff throat with green spots, and a darkish green breast. Males of subspecies C. v. dichroura weigh 4 to 10 g (0.14 to 0.35 oz) and females about 7.9 g (0.28 oz). Males have an emerald green forehead, a bluish throat patch, a whitish chest band, and a wide bronzy band at the end of the tail. The female is similar but without the throat patch. Subspecies C. v. albicaudata weighs 6 to 12 g (0.21 to 0.42 oz). Males have a bottle green head with an iridescent turquoise forehead and a shiny golden copper back. The outer tail feathers are whitish to pale green at the end and the others a darker green. The chin is moss green, the throat patch violet, the breast moss green, and the belly golden green. Females are similar to those of the nominate violifer but with the same tail colors as this subspecies' males. Males of subspecies C. v. osculans weigh 5 to 11 g (0.18 to 0.39 oz) and females 5 to 7 g (0.18 to 0.25 oz). Males have a greenish turquoise forehead and a dark shining green crown. The tail has a narrow bronzy band at the end. The throat spot is variable and the belly pale cinnamon. The female is similar but does not have the turquoise forehead or throat patch.