ILLINOIS NATURAL HISTORY SURVEY MANUAL 4 





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P1 . n j r Little brown bat 



Skunk Red tox 



Cottontail Woodchuck 



Pocket gopher mound 



Thirteen-lined ground squirrel j-j eer mouse 



Least shrew Prairie vole 



Pocket gopher Storage chamber of prairie vole 



Fig. 2. — Characteristic mammals of Illinois fields and fencerows. 



