Vol. XXXIl 

 1914 J 



Strong, Habits of the Herring Gull. 



23 



July, 1907, when I visited a breeding colony at Gull Island in Lake 

 Superior, near Marquette, Michigan. 



On June 20, 1911, I made a preliminary exploring trip in Green 

 Bay starting from my headquarters at Ephraim, Wisconsin. With 

 the aid of a motor boat, the Strawberry Islands, the Sister Islands, 



Fig. 1. Map showing locations of Gull colonies in region of GreeaBay, 

 Wisconsin. 



and Hat Island were all ^•isited during the da\', and colonies of 

 Herring Gulls were found breeding on all of these islands except at 

 the largest of the Strawberry Islands (See Plate III, Fig. 1) which 

 supported a colony of Great Blue Herons. 



As it did not seem practicable to attempt to live on any of the 



