

+ Types of Game Country. For game purposes Illinois may be 
classified as follows: 
Area Area Per 
type Acres og. Mi. Cent 

1 The Prairie 21,000,000 32,900 58 
(a) The Leake Region 6,900,000 5,900 7 
(Chicago area) 
(b) The New Drift Prairie. 7,500,000 11,700 21 
(Wisconsin Drift) 
(co) The Old Drift Prairie 4,000, 000 6,300 ba 
(Illinoian Drift) 
(d) The Loess Prairie 7,000,000 11,000 19 
2 The River Breaks & 
Bottoms 15,000,000 25 B00 2 
(original forest) 


Total 06 , 900,000 56,200 100 
Map A shows .roughly*the distribution of forest cover. The black 
area is the original forest; which with a few exceptions, occupied 
the river breaks and river bottoms. The colored areas are the. or- 
iginal prairie, sub-divided according to Leighton's classification 
of the origin of the surface soil (see Map G). 
2 Origin and Distribution of Soils. Soil seems to control abund- 

ance and kind of game, not only indirectly through agriculture, 
4s yet unknown. 
™ 
but directly through plant foods or other factors 
It is therefore important to set forth at the outset a general pic- 
ture of Illinois soils. 
Practically the whole state was covered by the southward-flow- 
ing ice sheet once or more times one everywhere ,however,did the 
melting ice leave behind the same kind or amount of drift.What is 
still more important,the drift left behind when the ice melted was 
subsequently more or less completely buried by wind-blow1 loess, and 
this loess was in turn mixed with drift by subsequent advances of 


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