44 



KEY TO Tin: WATER BIRDS OF FLORIDA. 



Family T.ARID.E. Guli.s and Terns. 

 Subfamily LARINyE. Gulls. 





X 



Laius argentatus smithsonianus. Larus atncilla. 



Length. 2i): Winn, ,S; Tail. S ; liill. 2.40. Larus marinus. 



Great Black=backed Qull. 



.See page 191 



Length, 24; Wing. 1750 Tail 7.50 ; Hill, 2. 1 0. Larus argentatus smithsoni= 



anus. 

 American Herring Qull. 



.See page 192 

 Length, 1H.40: Wing, 14; Tail. 6 : liill. about 1.65. 

 In summer, bill yellowish banded with black ; 

 in winter, tipped with dark bnnvn. Larus delawarensis. 



Ring=billed Qull. See page 192 



Length, KJ.50 : Wing. 12.50: Tail. 5 : liill. about j .75. 

 Adult — head and throat ])lumbeou.s in sumnK-r. 

 whitish in wintLr; bill reddish. LaruS atricilla. 



Laughing Qull. Seepage 193 



Length. i;}.r>0: Wing. 1<).4(>; Tail, 4.15; liill. 

 1.30. Adult in summer. — bill black; head and 

 neck plumbeous ; feet orange red; in winter, liill 

 black; head and neck white ; feet tle.sh color. Larus Philadelphia. 



Bonaparte's Qull. See page 193 



