These birds were common, often in flocks, in weedy areas and roadsides. This species is split from the former White-collared Seedeater which is now divided into two species. The Cinnamon-rumped Seedeater lacks wing-bars and is confined to the Pacific Coast of southern Mexico. The Morelet's Seedeater consists of two subspecies ranging from southern Texas to Panama. These Morelet's Seedeaters have fairly conspicuous wing-bars as seen here. Immature males resemble females but usually have a white spot at the bases of the primaries which females lack. For this reason, I think this bird is probably an adult female, although its wing-bars are whiter, less buffy, than usual.