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

Palmer thrasher leaving nest in cholla cactus.

Lucy warbler nest and three eggs in bark of a mesquite tree.

Lucy warbler nest in bark of a mesquite tree. No eggs showing.

Palmer thrasher just leaving nest in cholla cactus. Image note: shadow on body.

Kingbird nest and four eggs in the fork of a tree.

Herbert Brown standing beside a cholla cactus looking at a Palmer thrasher nest.

Pyrrhuloxia sitting in nest with open mouth. Image note: small size.

Pyrrhuloxia sitting in nest with open mouth. Image note: small size.

Pyrrhuloxia on nest with mouth open. Image note: side view, small size.