Herman Bohlman climbing a eucalyptus tree to photograph a red-tailed hawk nest.

William L. Finley in the top of a tree to photograph a red-tailed hawk nest.

Nest of a red-tailed hawk in the branches of a sycamore tree.

Herman Bohlman climbing a eucalyptus tree to photograph a red-tailed hawk nest.

Herman Bohlman perched on limb in tree photographing an eagle’s nest. Image note: regular lens, view from ground, soft.

View of canyon and golden eagle nest.

Two golden eagle downy young in nest with heads raised. Image note: close, three quarters front view, black background, third series.

Two golden eagle mottled young in nest. Image note: medium sized, regular lens, fourth series.

Two golden eagle downy young in nest with heads up. Image note: soft. “Awakening Instinct” Copyright 1905.

Two golden eagle downy young in nest. One with head raised. Image note: close view, third series.