18 



FURTHER OBSERVATIONS ON MINNESOTA BIRDS : 



taining about three-quarters of an acre and with its top about 20 

 feet above the surface of the water, affords on its rocky surface a 

 nesting place for hundreds of gulls." 



The Common Tern. 



Stomachs of the Herring Gull are found to contain grass- 

 hoppers, fish, mollusks, and, in one instance, the remains of a 

 marsh hare, possibly consumed as carrion. Professor Aughey re- 

 ported finding in the stomachs of each of four Black Terns from 

 47 to 84 grasshoppers or locusts, and in two stomachs examined, 

 from 28 to 59 other insects. 



THE MOURNING DOVE. 



Discussed quite fully in Cir- 

 cular 32, but at the time, we 

 were not able to present an il- 

 lustration. The drawing is 

 included here for comparison 

 with that of the Passenger 

 Pigeon or Wild Pigeon with 

 which the species is sometimes 

 confused. This dove was for- 

 merly included amongst the 

 Minnesota game birds, with a 

 regular open season, but it is 

 now protected until 1918. In 

 some localities in Minnesota re- 

 ferred to as "Ground Dove." 



