Orange-bellied Euphonia
Euphonia xanthogaster
The orange-bellied euphonia is 9 to 11 cm (3.5 to 4.3 in) long and weighs 9 to 16 g (0.32 to 0.56 oz). It has a thick stubby bill. The species is sexually dimorphic. Adult males of the nominate subspecies E. x. xanthogaster have a deep yellow forehead; the patch extends to well beyond the eye. The rest of their head and their nape are glossy blackish. Their upperparts, wing coverts, and flight feathers are glossy blue-black. The upper side of their tail is blue-black and the underside gray with white inner webs on the outer two to three pairs of feathers. Their throat is purplish black. Voice: The orange-bellied euphonia's song has some regional differences but their significance has not been studied. In Ecuador it has been described as "a variable, almost random-sounding, series of semimusical phrases given in a leisurely manner" and its calls as "a clear ding-ding-ding, a chee!, an upslurred kueé, and a more gravely cheeur-cheeur".
ID text from Wikipedia, CC BY-SA 4.0
Yellow-crowned Euphonia
Euphonia luteicapilla
The yellow-crowned euphonia is about 9 to 10 cm (3.5 to 3.9 in) long and weighs 11.4 to 14.5 g (0.40 to 0.51 oz). It has a short stubby bill. The species is sexually dimorphic. Adult males have a large yellow forecrown and crown; the color extends well past the eye. The rest of their head, nape, and throat are glossy blue-black. Their upperparts, wings, and tail are also glossy blue-black. Their breast, belly, and undertail coverts are bright yellow. Adult females have an olive head, upperparts, wings, and tail with a yellowish tinge on the forehead. Voice: The yellow-crowned euphonia sings "a short, dry sputtering series of notes, e.g. pit ditrééa-twiddledee bee bee" that has also been described as "a short wiry chut-tsip ts’tsew tsiuweer". Its call is "a series of 2–3 clear high whistled notes that may be given at varying speed, ee-bee-bee" or given as a longer series "beebee, peepeepee". It also makes "tsit notes" as a contact and flight call.
ID text from Wikipedia, CC BY-SA 4.0
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