Velvet-fronted Euphonia
Euphonia concinna
The velvet-fronted euphonia is 9 to 10 cm (3.5 to 3.9 in) long and weighs 9 to 12 g (0.32 to 0.42 oz). The species is sexually dimorphic. Adult males have a small yellow forecrown; the color extends just to the eye and is separated from the bill by a thin black line. The rest of their head and their upperparts are blue-black with a purplish gloss. Their tail is also blue-black. Their flight feathers are black with usually a small white spot at the base of the outer primaries. Their chin and throat are blue-black and the rest of their underparts are rich ochraceous to cinnamon-yellow. Voice: The male, and possibly the female, velvet-fronted euphonia sings "a slightly gravelly and varied series of phrases, e.g. p’wheeet-wheeet...pa’weet, whe’e’e’t, whe’e’e’t...pa’weet, p’bzrrrr, bzrrrr..." whose wheeet notes rise in pitch and are sometimes slightly burry. The bzrrrr notes are buzzy or rattling. Both sexes call with "a clear high dee-dee or tee dee-dee".
ID text from Wikipedia, CC BY-SA 4.0

West Mexican Euphonia
Euphonia godmani
The West Mexican euphonia is about 10 cm (3.9 in) long. The species is sexually dimorphic. Adult males have a small yellow forecrown; the color extends just to the eye. The rest of their head and nape are glossy blue-black with a purplish sheen. Their upperparts are glossy blue-black. Their tail is mostly blackish with white inner webs on the outer two pairs of feathers. Their upperwing coverts and flight feathers are blackish with some dark blue gloss. Their chin and throat are glossy blue-black with a purplish sheen, their breast and belly bright yellow, and their undertail coverts white. Voice: The West Mexican euphonia's calls include "1–3 pure thin whistles, dee-dee-dee, sometimes followed by 2 or 3 more on same or slightly lower pitch", a "shorter whit-it-it-it", and a "longer wheeee". It sings less than it calls, with "a weak twittering and chirping medley, e.g. wheetidy-titity-witity-titity".
ID text from Wikipedia, CC BY-SA 4.0
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Velvet-fronted Euphonia and West Mexican Euphonia.