Bullock’s Orioles are bright, flashy birds in all plumages. Mature males are deep orange, with black wings, back, and tail tips, and white wing-patches. They have black caps, black lines through each eye, and black throat patches. Females and first-year males are yellow where mature males are orange, but are whitish underneath. They lack the large white wing-patches, but do have two white wing-bars on each side. First-year males can be distinguished from females by their black throats and eye-lines.