TERNS. 



105 



Fig. 73 



^/y 



dusky above, some of inner tail 

 feathers tipped with black. 

 Breeds in the Arctic, south in 

 winter as far as Disco Bay in 

 Greenland. 



Ross Gull. 



73. SABINE GULL. 



Small, 13.50; tail prominently forked, 

 white, head and upper neck dark plumbeous, 



Fig. 74. 



• Sabine G-ull : summer adult. 1-4. 



below this a black collar; mantle, dark blue- 



