Painted Bunting - female
The Buntings are in general a dimorphic group, with plain-plumaged females and brightly colored males. They were pretty common in Mexico, although the males of course often refused to pose for a photo. Perhaps the females birds are more secure, as their colors usually blend well with the foliage. I think this is a Painted Bunting (Passerina ciris), either a female or first-year male. My male Painted Bunting was rather a blur.