Spot-crowned Euphonia

The spot-crowned euphonia is about 10 cm (3.9 in) long and weighs about 14 g (0.49 oz). It is a small euphonia with a stubby bill. The species is sexually dimorphic. Adult males have a bright yellow forehead; the patch extends to the rear of the eye and is speckled with black. The rest of their crown and their face, nape, throat, chest, and upperparts are steely blue-black. Their upperwing coverts are a slightly glossy blue-black. Their flight feathers are dusky with a blue-black tinge and white bases on the inner webs of most feathers. Their tail is dusky with a blue-black tinge. Voice: The spot-crowned euphonia "produces rolling, buzzy utterances". Its song "typically consists of a note or phrase repeated 5–8 times, followed by abrupt shift to another series; some songs are clear sweet warbles, others chaffy or wheezy and dry, e.g. chip a cheer weet; chip tuck tuck; wee churee-cha..., and so on". A song bout may last up to 30 minutes.