KEY TO THE WATER BIRDS OF P'LORIDA. 



Subfamily STERNIN.^. Terns. 



Sterna maxima. 



Sterna fuliginosa. 



Length, 21; Wing, 10; Tail, 6.10: Tarsus, i. So ; 

 Bill, 3. Bill tleep red ; primaries dark slate 

 color on inner webs. 



Length, 19: Wing, 14; Tail, 7.10; Bill, 2.40. Bill 

 orange or yellow ; back pearl gray ; under parts 

 white. 



Length, 17: Wing, 11.50: Tail. 7.20 ; Bill, 1.70. Bill 

 black ; back and upper parts brownish black : 

 under parts white. 



Length. 15.50; Wing, 10.50 ; Tail, 5.60; Bill, 2.10. 

 Bill black tipped with yellow ; back pearl gray; 

 under parts white. 



Length, 15; Wing, 10.30; Tail, 5.50; Bill, 1.45; Tar- 

 sus, .70 to .80. Adult in summer — Bill red tipped 

 with black ; feet red ; under parts asliy. Adult 

 in winter — under parts white ; bill browni.sh black; 

 Outer web of outer tail feather darker than 

 inner web at all seasons. 



Sterna tsche^rava. 

 Caspian Tern. See page 62 



Sterna maxima. 



Royal Tern. See page 6- 



Sterna fuliginosa. 



Sooty Tern. See page 66 



Sterna sandvicensis acuflavida. 

 Cabot's Tern. See page 62 



Sterna hirundo. 

 Common Tern. See page 64 



