An unidentified man with a camera on a tripod photographing a red-tailed hawk perched in a nest on a saguaro cactus.

An unidentified man with a camera on a tripod photographing a red-tailed hawk perched in a nest on a saguaro cactus.

A red-tailed hawk perched in a nest on a saguaro cactus.

Three red-tailed hawks perched in a nest on a saguaro cactus.

Three red-tailed hawks perched in a nest on a saguaro cactus.

Two golden eagle downy young in nest. Image note: telephoto, third series.

Two golden eagle downy young in nest. Image note: telephoto, third series.

Two golden eagle downy young in nest. Image note: medium size, telephoto, third series.

Two golden eagle downy young in nest. Image note: close side view, black background, third series.

View of golden eagle young in nest. Image note: rear lens, third series.