Palmer thrasher nest in a cholla cactus.

Palmer thrasher on edge of nest. Image note: large size, shadow across body, taken from blind.

Female plumbeous gnatcatcher standing in nest with wings spread to protect young bird from the sun.

Male plumbeous gnatcatcher on the edge of nest after feeding young.

Male plumbeous gnatcatcher on the edge of nest after feeding young. Image note: side view.

Male plumbeous gnatcatcher on the edge of nest in cholla cactus. Location note: beyond university.

Male plumbeous gnatcatcher on the edge of nest after feeding young. Image note: tail blurred.

Male plumbeous gnatcatcher on the edge of nest after feeding young. Image note: side view, good.

General view of a cholla cactus showing the nest of a cactus wren.

General view of a cholla cactus showing the nest of a cactus wren.