Thurber junco (Oregon snow bird) on nest with open mouth. Image note: contrasty plate.

Thurber junco (Oregon snow bird) on nest. Image note: upright plate, small size.

Thurber junco (Oregon snow bird) on nest. Image note: thin plate.

Thurber junco (Oregon snow bird) on nest. Image note: side view.

Thurber junco (Oregon snow bird) on nest. Image note: front view.

Thurber junco (Oregon snow bird) on nest. Image note: upright plate, thin.

Thurber junco (Oregon snow bird) in nest with mouth open. Image note: dense plate, plate turning yellow.

Thurber junco (Oregon snow bird) sitting on the edge of its nest. Image note: back view.

Thurber junco (Oregon snow bird) on nest covering young.