Violet-throated Starfrontlet

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. Voice: What is thought to be the song of the nominate subspecies of violet-throated starfrontlet is "a mellow drawn-out whistle followed by three nasal notes 'drreeeuw…nyeh-nyeh-nyeh'." It also makes "very sweet and mellow" single or double notes. The presumed songs of both C. v. albicaudata and C. v.