The Hummingbirds of North America, Second Edition

Those of the Gray Wind: The Sandhill Cranes, New Edition

Earth, Water, and Sky: A Naturalist's Stories and Sketches

Grassland Grouse and Their Conservation

The Avian Brood Parasites: Deception at the Nest

A Chorus of Cranes: The Cranes of North America and the World

Yellowstone Wildlife: Ecology and Natural History of the Greater Yellowstone Ecosystem

Wildlife of Nebraska: A Natural History

Wildlife of Nebraska: A Natural History

Seasons of the Tallgrass Prairie: A Nebraska Year

Seasons of the Tallgrass Prairie: A Nebraska Year