Birding with a Purpose: Of Raptors, Gabboons, and Other Creatures

Hamerstrom, Frances

The Biology of Moult in Birds

Lukas Jenni, Raffael Winkler

Waterfowl in Winter

Weller, Milton W

Hawks, Eagles and Falcons of North America: Biology and Natural History

Johnsgard, Paul A.

North American Owls: Biology and Natural History [First Edition]

Johnsgard, Paul A.

Population Ecology of Raptors

Newton, Ian

The Ducks, Geese and Swans of North America: a Vade Mecum for the Naturalist and the Sportsman

Kortright, Francis H.

Illustrations by T.M. Shortt

The Natural History of Cape Clear Island

Sharrock, J.T.R., editor

How Birds Work: An Illustrated Guide to the Wonders of Form and Function - from Bones to Beak

Taylor, Marianne

Understanding Bird Behavior: An Illustrated Guide to What Birds Do and Why

Tong, Wenfei, foreword by Ben C. Sheldon

Coro-Coro: The World of the Scarlet Ibis

Zahl, Paul A.

The Bird Way: A New Look at How Birds Talk, Work, Play, Parent, and Think

Ackerman, Jennifer