FAM. LX. TERNS AND GULLS 



333 



22. Franklin's Gull (59. Ld,rus franklinii).—K western, 

 small, black-headed gull, pearl-gray mantle, and the lower 

 parts and the tail white. The whole head and throat are sooty- 

 black, and the lower parts are often rosy tinted. The first 

 primary is mainly white, but the outer web is black except at 

 the tip ; the second has a black mark on the inner web, and 

 a black strip on the outer web near the tip ; the third to the 

 sixth are tipped with white. In winter, the head and neck 

 are white. The young is much marked with grays and browns. 

 This gull is not found on the Atlantic coast. 



Length, 14; wing, llj ; tail, i\; tarsus. If; culmen, 1^. Interior 

 Nortli America, chiefly from tlie Rocliy Mountains to the Mississippi 

 River ; breeding from Iowa northward, and wintering from the Southern 

 States to Peru. 



23. Bonaparte's Gull (60. Lhrus philadilphia). — A small, 

 black-billed, almost black-headed, white-tailed, white-bellied 

 gull, with the wings and back pearl-gray and the first three 

 primaries tipped with black, the next three with small, 

 white tips and three large black spaces. In winter the 

 head and throat are white. The young has the back varying 

 from brownish to pearl-gray, the tail banded with black 

 and white, and the 

 head tinted with 

 grayish. 



Length, 13 ; wing, 

 lOJ ; tail, 4 ; tarsus, 

 If ; culmen, If. North 

 America generally; 

 breeding mainly north 

 of the United States, 

 and wintering from the 

 Middle States south- 

 ward to the Gulf. 



24. Sabine's Gull 

 (62. Xima sabinii). 

 — A very rare, northern, winter- visiting, small, tern-like gull, 

 with a pure white, slightly forked tail. The head and neck 



Sabine's Gnll 



