144 



KEY TO Tllli WATER BIRDS OF FLORIDA. 



Family LARID.E. Gulls and Terns. 

 Sup.FAMiLY LARIN^-E. Gulls. 



m- 



m 



r 



Larus argentatus smithsonianus. 



Larus atricilla. 



Leno-th, 21): Win"-, iS: Tail. S ; 



2.40. 



Length, 24; Wing, ,750 Tail, 7.50; ISill, 2.1(K 



LLn-th, 18.40; Wing, 14; Tail. 6 : liill. about 1.65. 

 In summer, bill yellowish banded with black ; 



in winter, tipped with dark brown. 



Larus marinus. 

 Great Black=backed Gull. 



See pnge 191 



Larus argentatus smithsoni- 

 anus. 

 American Herring Gull. 



See page 192 



Larus delawarensis. 



Ring=billed Gull. See page [92 



Length, 10.50: Wing. 12.50: Tail. 5 : Hill, about i.; 

 Adult — head and throat ])lumbeous in .sumnn 

 whitish in winter; bill reddish. 



Larus atricilla. 

 Laughing Gull. 



See page 193 



Length, i;5.50; Wing, 10.40; Tail, 4.15; P.ill, 

 1.30. Adult in summer, — bill black: head and 

 neck plumbeous : feet orange red; in winter, liill 

 black; head and neck white; feet flesh color. Larus Philadelphia. 



Bonaparte's Gull. See page 193 



