CONTENTS. 



PAGE 



Title-page .... i 



Preface . • • 5 



Contents . .7 



Glossary . . 11 



Topography of a Bird 12 



Introduction . . 13 



What a bird is .13 



The wing 13 



The tail . 15 



The leg and foot 16 



The bill 17 



How to Measure a Bird . . 20, 21 



Index to Key to Families. Water Birds 22 



Key to Families. Water Birds 23 



Group i. Toes, four, with lobate webs, or webs on sides 



of toes . 23 

 Group 2. Toes, four; front toes, palmate (full webbed); 



hind toe not connected with front ones by web 24 

 Group 3. Toes, four, full webbed; hind toe connected 



with front ones by web 27 

 Group 4. Toes, four, not full webbed; small webs be- 

 tween toes at base, or toes entirely without web 28 

 Section i. Hind toe, raised above level of front toes 28 

 Section 2. Hind toe, on level with front toes 30 

 Group 5. Toes, three, full webbed; no hind toe . 32 

 Group 6. Toes, three; a small web between toes, or 



entirely without web . 7,7, 

 Key to the Species of Water Birds of Illinois and 



Wisconsin 35 



Family Colymbid^. Grebes . 3^, 275 



Family Gaviid^. Loons . 37, 2S2 



Family Alcid^. Auks, Murres, etc . . 39, 279 



Family Stercorariid^. Skuas and Jaegers . 41, 286 



Index to Key to Family Larid^e . . 42 



7 



