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

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 in winter.

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

View of a tree showing a red-tailed hawk's nest and Herman T. Bohlman at nest.

Two young rufous hummingbirds in nest in spirea in south Portland.

Two young rufous hummingbirds in nest in spirea in south Portland.

Two young rufous hummingbirds in nest in spirea in south Portland.

Two young rufous hummingbirds in their nest on a fir limb in south Portland.

A young rufous hummingbird in its nest in a rose bush. Taken by Dr. Kellogg.