Elegant Euphonia
Chlorophonia elegantissima
The elegant euphonia is 10 cm (3.9 in) long and weighs 13 to 17 g (0.46 to 0.60 oz). The species is sexually dimorphic. Adult males of the nominate subspecies C. e. elegantissima have a rufous forehead with a thin black border behind it. Their crown and nape are bright turquoise-blue that extends forward from the latter under the ear coverts. The rest of their head and their throat are black. Their upperparts, tail, and wings are glossy purplish black. Their underparts are tawny-orange that is darkest on the breast. Adult females have a rufous forehead. Voice: The elegant euphonia's song has been described as a "rapidly delivered liquid warble lasting up to several minutes with various complaining chatters, buzzes, and clear whistles". Its calls include "a sharp sip or suiit and a nasal ernt".
ID text from Wikipedia, CC BY-SA 4.0
Golden-browed Chlorophonia
Chlorophonia callophrys
The blue-crowned chlorophonia is a chunky, short-tailed, stubby-billed bird. It is about 13 cm (5.1 in) long and weighs about 24 g (0.85 oz). The species is sexually dimorphic. Adult males have pale violet-blue crown and nape, under the crown a golden-yellow forehead and wide supercilium, and a turquoise eye-ring. The rest of their face, their throat, and their upper breast are emerald-green. They have a thin turquoise collar under the nape and a thin black and chestnut line under the upper breast. Their upperparts are same shiny green as their face. Voice: The golden-browed chlorophonia's song is a "mournful, single-note whistle" that lasts about a second. It has been written as "koow or keeeu". It also makes contact calls that are "soft nasal notes, e.g. neck, and jip and jup". Its song is "a jumble of short but clear and melodious notes, rather disconnected, all given rather softly". In Costa Rica its local common name is a rualdo.
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: Elegant Euphonia and Golden-browed Chlorophonia.