Female Western Bluebird (Sialia mexicana), Feeding Young in Nest Box, Southwestern Colorado, United States, North America
Male Western Bluebird (Sialia mexicana), Feeding young in Nest Box, Southwestern Colorado, United States
Female Western Bluebird, Sialia mexicana, with Insect in its Beak, Being watched by an immature brown-headed Cowbird that it raised when Cowbird laid its egg in the bluebird nest, La Plata County, Colorado, USA, North America
