Scientific Name: Calamospiza melanocorys
Population Estimate: 27M
Range / Habitat: Tall, dense grassland. Winters in northern Mexico. Summers in Great Plains of the United States.
Field Notes: Medium-sized sparrow with short, thick, bluish bill. Large white patches in wing. Breeding male all back with white wings. Female and nonbreeding male grayish brown and heavily striped.
Personal Notes: Seen at Buffalo Gap National Grasslands, South Dakota.