HOW TO KNOW 



^ ? 



THE 



Ducks, Geese and Swans 



OF 



NORTH AMERICA 



AI-L THE SPECIES BEING GROUPED ACCORDING TO SIZE AND COLOR 



BY 



CHARLES B. CORY 



Curator of the Department of Ornithology in the Field Columbian Museum, Chicago; Fellow of the 



Linncean and Zoological Societies of London; Member of the American Ornithologists' Union, 



and of the British Ornithologists' Union ; Honorary Member of the California 



Academy of Sciences ; Cor. Member New York Academy of Sciences, etc., etc. 



Author of "The Beautiful and Curious Birds of the World," "The Birds of the Bahama 



Islands," "The Birds of Haiti and San Domingo," "The Birds of the West Indies," 



" A Naturalist in the Magdalen Islands," " Hunting and Fishing 



IN Florida," " Key to the Water Birds of Florida," " How to 



know the Shore Birds of North America," etc., etc. 



< ■ • ■» 



FOR SALE BY 



LITTLE, BROWN & CO. 



BOSTON 



1897 



