CLASSIFICATION OF THF BIRDS OF XoRTII 

 AMERICA.* 



or.nrn i- pv(;()i'(>i)i:s divinc; hmids). 



DiK'klik*' birds, with generally sharply i)()inted bills; 

 feet welibed. placed far back near the tail; tarsus much 

 llattened : hind toe. when present, with a lobe or flap ; 

 bill without toothlike projections : tail very short, and 

 soMictinies apparently wanting. 



F.VMILV 1. — Podicipidfv. Grebes; G species. 

 Family :i. — Uriiutfondw. Loons; 5 species. 

 Family li.— Ale idee. Auks, Murres, and Puffins ; 22 

 si)ecies. 



<)iii>i;ii ii.-l<)\(;iim:\\i:s iI.<)X(;-avin(;i:i) 

 s\vi.>i>ii:ns). 



15irds with sharply pointed and fi'equently hookcHl or 

 hawklike bills; toes four (except in the genus Rissa), the 

 front ones webbed: wings long and ])ointed. 



Family i.^Sfrrrorariida'. Skuas and .laeLicrs; 1 spe- 



eifs. 

 Family r». Ijtridn'. (lulls and Tcnis; 4.'J species. 

 ^'\.^llI.^' (I.- Ii\//tirh<>pi(hr. Skidiiiiri-s : 1 species. 



<)Ki>i:k in. II itr\\Ki:s i ri i;i;-.\(>si;i) 



SWIM Ml Its). 



Bill hawklike, the tip of the upper inandiblr generally 

 much enlarged ; nostrils opening through tub(\s ; hiiul toe 



* The nrr«nj:eiiu'nt nnil iioiiu'iiclature here given is based on the 

 AriK-ricaii ()riiilli<.](.gi-( I'liimi's {"licek-Lisl, ',M »Mlili..ii. 1S<)5. 



8;j 



