Birding with a Purpose: Of Raptors, Gabboons, and Other Creatures
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]
Population Ecology of Raptors
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
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