A downy young glaucous gull chick in the palm of an unidentified woman’s hand. Two eggs are in a nest below.

Close view of a laughing gull nest containing three eggs.

Close view of a laughing gull nest containing three eggs.

Pyrrhuloxia sitting on nest. Image note: side view, large size.

Two young phainopepla birds in nest.

Two young phainopepla birds in nest.

Desert sparrow nest and three eggs in sage brush.

Vermilion flycatcher nest and three eggs on limb of a mesquite tree. Image note: upright plate.

California house (linnet) finch nest with three eggs in a cholla cactus.

Palmer thrasher leaving nest in cholla cactus.