114 LONG-WINGED SWIMMERS. 



phere ; in N. A. breeds on coast and it suit- 

 able places in interior east of plains from 

 Fla., Tex. and Ariz., north to the Arctic in 

 May; south in Sept., but a few linger on 



Fig. 82 



Young Common Tern. 



coast until middle Oct.; winters south of the 

 U. S. Abundant. 



80. FOSTER TERN. 

 Differs from last in having bill black, 

 outer webs of tail feathers white, fig. 82; in 

 winter entire top of head and occiput white, 

 but there is a wide black space about eye, 

 fior. 88. Young similar to winter. Bill and 

 feet, always black. Breeds chiefly, in the in- 



