106 



LONG-WIXGED SWIMMERS. 



gray; primaries, black five inner tipped with 

 white; bill, black yellow tipped; feet, black, 

 figs. 74, 75. In winter, head white, spot on 

 side and patch on occiput plumbeous. Young, 



Sabine Gull: summer adult. 



brown-gray above; tail, white with a subter- 

 minal band of black. Arctic; south in winter 

 very rarely as far as Mass., N. Y. and Great 

 Lakes. 



TERNS. 



Variable in size but generally more slen- 

 der and graceful than gulls; bills, pointed 

 never hooked; wings, long and pointed; feet, 



