Bronze-green Euphonia

The bronze-green euphonia is 9 to 10 cm (3.5 to 3.9 in) long and weighs 12 to 15 g (0.42 to 0.53 oz). It is a rather drab euphonia with a thick stubby bill. The species is sexually dimorphic. Adult males of the nominate subspecies have a bright yellow forehead with a thin dark olive band below it. Their mid-crown is olive, their rear crown grayish, and their nape and the rest of their face olive. Their upperparts are olive with a strong gray-blue gloss. Their upperwing coverts are olive-green and their primary coverts blackish. Voice: One description of the bronze-green euphonia's song is "2 clear notes followed by a musical trill, tee-teeu-trrrrrt". Another is "usually a whistled note followed by one or more ringing rattles, for example peew brrrrrrr brr brr". Its call is "a distinctive, gravelly treeuh, treeuh".