ACKNOWLEDGEMENTS 
The annual Singing Ground Survey would not be 
possible without the. cooperation of the Canadian Wildlife 
Service, the State Conservation Departments and the 
individuals on their staffs. The names of persons who 
made counts are given in Tables 3 and 4. Field data were 
compiled, in part, by personnel in both the Canadian 
Wildlife Service and Regions 3, 4 and 5 of the Bureau. 
The following State agencies participated in the 1961 
survey: 
Connecticut Board of Fisheries and Game 
Indiana Department of Conservation 
Illinois Department of Conservation 
Iowa Conservation Commission | 
Kentucky Department of Fish and Wildlife Resources 
Maine Department of Inland Fisheries and Game, and Maine 
Cooperative Wildlife Research Unit 
Massachusetts Cooperative Wildlife Research Unit 
Michigan Department of Conservation 
Minnesota Department of Conservation 
New Hampshire Fish and Game Department ! 
New Jersey Department of Conservation and Economic Development 
North Carolina Wildlife Resources Commission 
Ohio Department of Natural Resources 
Pennsylvania Game Commission, and Pennsylvania Cooperative 
Wildlife Research Unit 
West Virginia Conservation Commission 
Wisconsin Conservation Department. 
