FAM. LX. TERNS AND GULLS 



327 



black. The outer tail 



feathers are white, 



with brownish on the 



terminal half of the 



inner web. 



Length, 16; wing, 12 ; 

 tail, Tl, forlied, 3} ; tar- 

 sus, 1; culmen. If. Trop- 

 ical regions generally ; 

 breeding in North Amer- 

 ica rarely north to North 

 Carolina ; wanderin. 

 United States. The Bridled Tern (76 



ooty Tern 



to New England, and wintering south of the 

 Sterna anmthettts) has the 

 two outer tail feathers 

 wholly white. It is a 

 tropical tern ; casual in 

 Florida. Wing, lOJ ; 

 tail, 6J ; tarsus, | ; cul- 

 men, IJ. 



Bridled Tern 



11. Black Tern (77. 

 FlydrocliRidon nigra 

 surinaminsis). — A 

 small, short - tailed, 

 black tern, with the 

 back, wings, and tail somewhat lighter and more slate colored, 

 and the under tail coverts white. The young (also the adult 

 in winter) has the front head and under parts mainly white, 

 and the back and 

 wings pearl-gray. 

 This is an insect- 

 eating bird, and is 

 often found far 

 from large bodies 

 of water, and oc- 

 casionally on the 

 driest of open 

 plains. 



Length, 10 ; wing, 8J : 



Black Tern 



tail, 3f, forked, | ; culmen, 1. America, from 



