State of Illinois 
Dwight H. Green, Governor 
Department of Registration and Education 
Frank G. Thompson, Director 
PRELIMINARY REPORT ON THE CANADA GEESE 
OF THE MISSISSIPPI FLYWAY 
Harold C. Yanson 
and 
Robert H. Smith 
Published by Authority of the State of Illinois 
Natural History Survey 
Harlow B. Mills, Chief 
Biological Notes No. 18 Urbana, Illinois September, 1947 
