302 



SWIMMERS. 



to S. A.; comes north in April. Not common 

 north of Cape Cod. 



69. FRANKLIN GULL. 

 A little smaller than last, 14; differs in 

 being darker above; primaries, bluish-gray 

 and in all stages broadly tipped with white. 

 Breeds from 0. north through Minn, and the 

 interior of Canada. Often occurs far from 

 water subsisting upon insects, and is known 

 as the Prairie Dove. 



70. BONAPARTE GULL. 



Smallest of our Gulls, 13; mantle pale bluish, 



Fig. 71. 



Bonaparte Gull; upper tig. summer adult; lower, young. 



tail and lower parts, white; primaries, white 



