Blue-naped Chlorophonia

The blue-naped chlorophonia is a chunky, short-tailed, stubby-billed bird. It is about 11 cm (4.3 in) long and weighs 11 to 15 g (0.39 to 0.53 oz). The species is sexually dimorphic. Adult males of the nominate subspecies C. c. cyanea have a mostly glistening emerald-green head, throat, and chest. They have a turquoise-blue ring around the eye. Their nape and most of their upperparts are blue with a lighter and brighter blue rump. Their tail's upper surface is dusky with green-blue feather edges and its underside is gray. Their flight feathers are dusky with bright green edges. Voice: The blue-naped chlorophonia's song is "a choppy series of call notes mixed with liquid whistles, short warbles, and piercing notes". Its calls include "a descending, whistled heu or seeu and a nasal, mechanical enk and dit".