150 



Game Survey of the North Central States 



History. There are two questions of outstanding importance on which 

 historical evidence is needed: 



(1) How long have cycles occurred, and where? 



(2) Where were the heaviest populations originally found? 



RUFFED GROUSE 



AND SPRUCE HEN 



AS DETERMINED BY A 



GAME SURVEY 



OF THE NORTH-CENTRAL STATES. 



MADE 8r ALDO LEOPOLD IN 1928- 1929 FOR THE 



SPORTING AHMS I AMMUNITION MANUFACTURERS' INSTITUTE 



MICHIGAN BY MILES D PiRNie 



^ 



(Righi dale lasi seen) 

 Range (R G m every township) --.-..- ACCUN 



ntj Range showing Irrupfive Behavior since f 



> from islands *iih apparently suitable ra 

 sllara (acres per RO) Oaie bdo* 



: Range Boundary 

 X) (dates on Ubel) 



MAP 13 



The meager findings of the survey on the first question have already been 

 presented in the chapter on cycles. 



Of the second question it seems safe to say that ruffed grouse were originally 

 abundant in the central part of the region where they are now scarce or absent. 



