THE BIRDS OF NORTH AMERICA EAST OF THE 

 NINETIETH MERIDIAN. 



KEY TO ORDERS AND FAMILIES. 

 TUB WAT£B BIHDS. 



7). 



OSS 



•ed 



Fio. 6. 



Order I* Pygopodes.— Grebea, Loons, and Ai'KS. 



Ducklike liirds with gt'iienilly «hurply pointed bills; feet webbed, placed 

 far back near the tail ; tarsus much Hattened ; hind toe, when present, 

 with a lobe or Hap; bill without toothlike projections; tail very short 

 and sometimes apparently wanting. 

 A. Toes four, tipped with a broad nail. 



a. Toes with lobate webs. . . . Family Podicipidce'. 

 GuEBEs (FifT. 5, a), p. 5G. 



b. Toes webbed. . . . Family i'rinatondce: Loons (Fig. 

 5, 6), p. 58. 



£. Toes three, tipped with a sliarp nail. . . . Family 

 Alcidce: Auks, Murues, and Puffins (Fig. 5, c), p. 60. 



a 



,^^ 





Order H. liOn^pennes. — Jaeoers, 

 Gt'LL.i, and Terns. 

 Birds with sharply pointed and frequently 

 hooked or hawklike bills; toes four (ex- 

 cept in one genus — Jimn), the front ones 

 webbed ; wings long and pointed. 



41 





Fio 6. 



