A bluebird at its nest hole in an apple tree. Image note: small size.

Steller's jay nest and eggs in a fir tree.

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

Gambel’s sparrow nest and eggs. Taken in Jennings woods.

Cassin’s vireo on nest. Image note: small size.

Adult Parkman’s wren perched on top of a stump with food in bill. Image note: side view.

Adult Parkman's wren perched on top of a stump with food in bill. Nest entrance showing below. Image note: side view.

Four young western robins, two on edge of nest and two on fir bough.

Four young western robins, two on edge of nest and two on fir bough. Image note: plate thin.

Two young western robins on the edge of a nest. Image note: front view, bills crossed.