Tule wren nest in the cattails.

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.

Cactus wren nest in a cholla cactus. Adult cactus wren perched near entrance with food for young.

View of three tule wren nests in the tules.

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.

Adult Parkman’s wren about to enter nest in hole in stump. Image note: complete back view.

Young Parkman’s wren sitting in the entrance to its nest.

Young Parkman’s wren sitting in the entrance to its nest.