Complete Wildfowl Studies- 3 Volume Set
Waterfowl of North America
North American Ducks, Geese & Swans: An Identification Guide
Todd, Frank S.
Observations of Wildlife
A Natural History of the Ducks
Phillips, John C.
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 Shelduck: A study in behavioural ecology
Ducks, Geese, and Swans of the World
Johnsgard, Paul A.
Waterfowl: Care, Breeding and Conservation