PRELIMINARY KEYS TO 
WATERFOWL AGE AND SEX IDENTIFICATION 
BY MEANS OF WING PLUMAGE 
By 
Samuel M. Carney 
Migratory Bird Populations Station 
Division of Wildlife Research 

U.S. 
DEPARTMENT OF THE INTERIOR 

FISH AND WILOLIFE SERVICE 
Special Scientific Report--Wildlife No. 82 
Washington, D. C. + March 1964 
LIBRARY, WILDLIFE RESEARCH CENTER 
U.S. FISH & WILDLIFE SERVICE 
BLDG. 16, FEDERAL CENTER 
DENVER, COLORADO 80225 “ 
