Breeding males are glossy black with purplish head and greenish sheen on body. Nonbreeding males have pale eyebrows and staring yellow eye. Females are plain dark brown and typically have dark eyes. Forages by walking on ground. Sometimes in mixed flocks with other blackbirds at feedlots. Also, walks along parking lots, golf courses, or roadsides. Females similar to Brown-headed Cowbird, but with longer, thinner bill and longer tail than cowbird.