32(3 KEY AM) DESCRIPTION 



7. Arctic Tern (71. Sth-na jmradlscea). — This is almost 

 exactly like the last, but the tail is somewhat larger, and the 

 bill decidedly redder. Mr. Brewster says the usual cry of the 

 Arctic tern is shriller and more pig-like. 



Length, 15J ; wing, 10-11 ; tail, 0-8}, forked, 4\ ; tarsus, f ; culnien, 

 1|. Northern hemisphere ; breeding from Massachusetts northward, and 

 wintering soutli to Mrginia and California. 



8. Roseate Tern (72. .Sterna dougalli). — A rare, black-billed, 

 white-tailed tern, with back and wings pearl-gray, and the white 

 under parts often delicately pink-tinted. The bill is slightly 

 reddish at base, especially in yonng birds. In summer, the 

 whole top of the head is black, but in winter, the front of the 

 head is white with black streaking; the under parts in winter 

 are pure white. Mr. Chapman says this species "is a less 

 excitable, wilder bird than hin'iniJo [Xo. (>.], and its single harsh 

 note, cavlv, may be distinctly heard above the uproar of common 

 terns, as it hovers somewhat in the background." 



Length, 15} ; wing, Oi (OJ-OJ) ; tail, 7J, forked 4 ; tarsus, | ; culmen, 

 \\. Tropical regions generally ; breeding north on the Atlantic coast, 

 rarely to Maine, and wintering south of the United States. 



9. Least Tern (74. Sterna antiUhmm). — A very small, rare 

 tern, with the back, wings, and tail pearl-gray, the tinder 



parts white, the forehead white, and the 

 bill mainly yellow. There is a black cap 

 extending forward past the eyes, and the 

 outer webs of the outer primaries are 

 *\ black. The j/oiduj is somewhat mottled 



" < and has a blackish bill. 



Least Tern 



Length, 9 ; wing, G| ^ tail, 3J, forked, nearly 

 2; tarsus, f ; culmen, 1^. Northern South America, and north to New 

 England, Minnesota, anil California; breeding mainly throughout. Cas- 

 ual to Labrador. 



10. Sooty Tern (7"). Sterna fuJic/indsa). — A large tern, with 

 nearly all the upper surface black, and the lower surface 

 white. The tail is deeply forked, and the bill and feet are 



