Blue-crowned Chlorophonia

The blue-crowned chlorophonia is a chunky, short-tailed, stubby-billed bird. It is about 13 cm (5.1 in) long and weighs 25 to 27.5 g (0.88 to 0.97 oz). The species is sexually dimorphic. Adult males have a mostly shiny emerald-green head with a circular turquoise-blue patch in the center of the crown. Their throat and upper breast are the same green. They have a thin turquoise-blue collar under the nape and a thin black and chestnut line under the upper breast. Their upperparts are a slightly darker shiny green than their head. The upper side of their tail is green and the underside gray. Voice: The blue-crowned chlorophonia's calls include "a liquid tinkling where'my'shirt or two'eet! and a nasal wrap". It also makes "a fairly low, mournful whistle, peeeeewwwww". Its song is "a long, rather breezy series of turdle-dee phrases mixed with rougher, lower-pitched chup or dit notes".