Water jowl 



201 



(3) The phenomenal success of resting grounds or refuges. 



(4) Public recognition of the fact that drainage is not always desirable, 

 even from an economic standpoint. 



The unfavorable trends are: 



(5) Rapid commercialization of waterfowl grounds, accompanied by com- 

 petitive over-organization of shooting methods and equipment. 



WATERFOWL 



AS DETERMINED BY A 



GAME SURVEY 



OF THE NORTH-CENTRAL STATES. 



MADE BY ALDO LEOPOLD IN iizs-mt FOR THE 



SPORTING ABMS4AMMUNITION MANUFACTURERS'INSTITUTE 



ng 



e dub or preserve 

 PublidyownedSoperated 



niunciion win Commercial 

 C'trer breeoiriLior 



up o( any , 8bovl! 



MAP 17 



(6) A growing area of idle breeding grounds, evidently due to the decima- 

 tion of local breeding stocks. 



(7) A growing area of idle feeding grounds of second-rate quality, and a 

 growing concentration on the few remaining first-rate grounds. The idle area is 

 evidently due to "burning out" or overshooting. 



