CONTENTS 



Preface .......... 



Mow TO MEASURE A BiRD . ..... 



(tLOSSAKV ... 



Inde.x to Key .... 



Key to the Ducks, G-eese and Swans of North AMEiircA 



Group 1. Birds having wings from 5 to 6.. 50 inches long 



2. 



4. 

 ."). 



6. 



7. 

 <S. 



6.. 50 to 7.50 inches long 



7.50 to 8.50 " 



.S.50 to 10 



10 to 12 



12 to 14 



14 to 19 



over 111 



The Mergansers, — Menjinn' 



The Fresh-water Ducks, — Aiialiiw^ 



The Salt— water Ducks, — F(di(jidini<' 



The Geese, — ^iu^criiui' 



The Swans, — Ciit/iuini' 



Index 



PAGK 



3 



(;-7 

 s 

 10 to i;! 

 66 

 15 

 16 

 18 

 21 

 26 

 32 

 33 

 36 

 37 

 41 

 53 

 80 

 01 

 1)3 



