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
Purple-throated Euphonia
Euphonia chlorotica
The purple-throated euphonia is 9 to 10 cm (3.5 to 3.9 in) long and weighs about 8 to 14 g (0.28 to 0.49 oz). The species is sexually dimorphic. Adult males of the nominate subspecies E. c. chlorotica have a bright yellow forehead and forecrown; the color extends to the rear of the eye. The rest of their head and their upperparts are glossy blue-black that in good light has a purplish tinge. The upper side of their tail is blackish and the underside duller with white on the inner webs of the outer two or three pairs of feathers. Voice: The purple-throated euphonia's song is "a jumbled series of squeaks, harsh notes and whistles" that is infrequently heard. A typical call is "a high, clear, whistled teee, deee" that is often lengthened to three or four notes as "teee, deee, deee"; occasionally it makes only a single "teee". The notes are on a single pitch.
ID text from Wikipedia, CC BY-SA 4.0
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