Painted buntings are small brightly colored birds. They are 12 to 13cm in length with an average body weight of 16 grams. Adult birds are dimorphic, the males being brightly colored. The head and nape of the males is blue, the back is bronze-green and the rump and underparts are red.The females are less brilliantly colored having dark greenish upperparts and yellow-green underparts.The wings and tail of both the male and female are dark brown or black contrasting with the rest of the body. The feet and legs, eyes and bill of both sexes are dark in color. The feet and legs are dull to dusky brown, the eyes are dark brown to hazel and the bill is dark brown to blackish in color. Plumage of juvenile birds resembles that of the adult female. The males differentiate from the females during their second year where they begin to exhibit the blue feathers on their head (Lowther et al. 1999).
Range mass: 13 to 19 g.