﻿CONTENTS. 
  

  

  Page. 
  

  

  Introduction 
  7 
  

  

  Protection 
  8 
  

  

  Causes 
  of 
  decrease 
  in 
  num 
  bers 
  of 
  waterfowl 
  10 
  

  

  Winter 
  ranges 
  13 
  

  

  Species 
  that 
  winter 
  principally 
  in 
  the 
  United 
  States 
  and 
  southward 
  . 
  . 
  13 
  

  

  Species 
  that 
  winter 
  in 
  the 
  United 
  States 
  and 
  Canada 
  13 
  

  

  General 
  remarks 
  on 
  migration. 
  14 
  

  

  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 
  breeding 
  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 
  migration 
  of 
  ducks 
  19 
  

  

  Distribution 
  and 
  migration 
  of 
  geese 
  65 
  

  

  Distribution 
  and 
  migration 
  of 
  swans 
  84 
  

  

  Index 
  89 
  

  

  5 
  

  

  