Double-collared Seedeater
Sporophila caerulescens
It is a dimorphic species, with the male having a gray head and back, a black-collared throat, paired with a black band just below, across the upper whitish breast. It has gray legs, a medium length tail, and the stout bill for seed-eating. The female is less colorful.
ID text from Wikipedia, CC BY-SA 4.0
Variable Seedeater
Sporophila corvina
The variable seedeater is a small, robust bird with a black conical bill. It is 10.5 cm (4.1 in) long and weighs 11 g (0.39 oz). There are four subspecies, which differ primarily in the plumage of the male: S. c. corvina – (P.L. Sclater, 1860): (nominate), found from southern Mexico and along the Caribbean slope from Belize south to Panama. Adult males are entirely black apart from a small white wing-speculum and white wing linings. S. c. hoffmannii – Cabanis, 1861: found on the Pacific slope of Costa Rica and Panama. Males resemble males S. c.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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