Marsh hawk nest and eggs.

Two downy young red-tailed hawks in their nest. Copyright, H. T. Bohlman 1902.

Two downy young red-tailed hawks in their nest. Image note: front view.

Two downy young red-tailed hawks in their nest. Image note: wide angle.

A red-tailed hawk's nest and eggs, showing the depth and structure of the nest.

A red-tailed hawk's nest and eggs. Taken on the first visit to the nest. Eggs just pipped, probably hatched the next day.

Herman T. Bohlman in a tree photographing a red-tailed hawk's nest. Image note: negative cracked and repaired.

Herman T. Bohlman climbing to a red-tailed hawk's nest. William L. Finley at the base of the tree. Image note: plate turning yellow.

Herman T. Bohlman climbing to a red-tailed hawk's nest in winter.

Herman T. Bohlman climbing to a red-tailed hawk's nest in winter.