CONTENTS. 
Page. 
Introduction 7 
Protect ion 8 
Causes ol decrease in numbers of waterfowl 10 
Winter ranges 13 
Species thai winter principally in the CTnited States and southward.. 13 
Species that winter in the United States and Canada 13 
General remarks on migration 1-4 
Tables of distribution 15 
Species occurring in Central America, West Indies, or Mexico, but not 
known to reach the United States 16 
European species occurring in North America as stragglers 16 
Species that breed and winter north of the United States 16 
Species that breed chiefly north of the United states 17 
Species that breed chiefly north of the Arctic circle, with the north- 
ernmost latitude at which the species has been observed in the 
Western Hemisphere 17 
Southern species, with northern limit of breedin_r range 17 
Western species, with eastern limit of regular range 18 
Southern limits of species whose winter range extends south of the 
United states 18 
Summary 18 
Distribution and mi'_rrati"n of du ki 19 
Distribution and migration of geese 65 
Distribution and migration of swans 84 
Index 89 
5 
