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, 1\, forked, 'i\ ; tar- 

 sus, 1; culinen, If. Trop- 

 ical regions generally ; 

 breeding in North Amer- 

 ica rarelV north to North ^°°*y "^"^ 

 Carolina ; wandering to New England, and wintering south of the 

 United States. The Bridled Tern (76. Sterna ancethetus) has the 



two outer tail featliers 

 wholly white. It is a 

 tropical tern ; casual in 

 Florida. Wing, 10 1 ; 

 tail, 6\ ; tarsus, | ; cul- 

 inen, H. 



Bridled Tern 



11. Black Tern (77. 

 HydrocMlidon nigra 

 surinamensis). — A 

 small, short - tailed, 

 black tern, with the 

 back, wings, and tail somewliat 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 

 Av i n g s 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, 8^ 



Black Tern 



tail, 3|, forked, |; culnien, 1. America, from 



