Male and Female Western Bluebird, Sialia mexicana, Building Nest in Nest Box, La Plata County, Colorado, United States, North America
Female Western Bluebird, Sialia mexicana, Sitting on a Nest, Inside a nest box, La Plata County, Colorado, USA, North America
Damaged Western Bluebird eggs, Sialia mexicana, In a Nest Box, La Plata County, Colorado, USA, North America
