Official State Bird of Colorado
The migratory lark bunting (Calamospiza melancorys Stejneger) was designated the state bird of Colorado in 1931. The male lark bunting performs a spectacular courtship flight while warbling and trilling a distinctive mating song. A breeding male is jet black with white wings but in winter changes to a gray brown color more like the smaller female bird.
Lark Bunting Facts
Though the lark bunting is still a common sparrow of the Great Plains, grassland bird species in North America have experienced large population declines in the past forty years. Lark buntings declined by 2.5% per year in Colorado between 1966 and 2003.
The Lark Bunting is the only sparrow that changes to a drab plumage for winter.