Description wikipedia

The blue-crowned chlorophonia (Chlorophonia occipitalis) is a species of bird in the family Fringillidae, the finches and euphonias. It is found in El Salvador, Guatemala, Honduras, Mexico, and Nicaragua. 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. Most flight feathers are black with green edges; their tertials are green. Their lower breast, belly, and undertail coverts are bright yellow and their sides and flanks green. Adult females have a smaller turquoise-blue crown patch than males and a light cerulean-blue collar. Their upperparts and tail are shiny green and their wings are like the male's. The center of their breast and belly and their undertail coverts are yellow and the rest of their underparts are green. Both sexes have a light brown to brown iris, a dusky maxilla with a bluish gray base, a bluish gray mandible with a dusky tip, and dark gray legs and feet.