Two common egret chicks in their nest. Image note: side view, close up.

Common egret chick in nest.

Common egret chick in nest.

Common egret chick in nest.

William L. Finley in a tree photographing great blue heron nests. A young heron is perched on a branch nearby. Image note: rear lens.

An unidentified man photographing a great horned owl perched in its nest on a saguaro cactus. A ladder is leaning against the side of the cactus.

An unidentified man photographing a great horned owl perched in its nest on a saguaro cactus. A ladder is leaning against the side of the cactus.

Two golden eagle downy young in nest. William Finley on limb to the side of the nest. Image note: long way of plate, regular lens, good, third series.

Two golden eagle downy young in nest. William Finley on limb to the side of the nest. Image note: regular lens, third series. “Downy young of the Golden Eagle” Copyright 1905.

William L. Finley with a camera on a tripod under a rock ledge photographing Sierra hermit thrush chicks in their nest near Paradise River in Mount Rainier National Park.