1^6 KEY TO THE WATER BIRDS OF FLORIDA. 



STERNA F0R5TERI Xutt. 

 Forster's Tern. 



Adult ill summer: Crown black ; upper parts pearl ^.ray : 

 under parts white : inner web of outer tail featlier 

 darker tlian outer web ; bill reddish orange tipped with 

 black : feet yellowish. Adult in winter : Bill dark brown : 

 feet brown : head grayish ; a dusky black patch on sides 

 of the head, enclosing the eye. Immature in winter : 

 Upper parts mottled with pale brown or buft". 



Length. 15 : Wing, 10.25; Tail, 6.60; Tarsus, .90; Bill. 

 1.50. 



The range of Forster's Tern extends nearh' 

 tln-ouo-hout North America. It is common in winter in Florida, both on the 

 east and west coast. It breeds commonly on Cobb's Island, Va. : the eggs 

 are two to three in number, nsnallv laid on the sand : they are pale buff or 

 greenish gray marked with dark brown. 



STERNA HIRUNDO //////. 

 Common Tern. Maclterel "Qufl." 



Adult in summer : Bill red, Ijroadly tipi)cd with black: feet red: crown black: upper parts 

 pearl gray; under parts pale ashy gray. Adult in winter : I-orehead and crown white or grayish 

 wliite : under parts white. Immature specimens liave the upper parts mottled with buff or pale 

 brown. The outer web of outer tail feather is darker than the inner web at all seasons. 



