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ILLINOIS NATURAL HISTORY SURVEY MANUAL 4 



those of pine mice, shrews, or white-footed mice. Similar run- 

 ways in a meadow or pasture are more likely to be those of 

 voles, bog lemmings, or deer mice. Other signs such as scats or 





Fig. 14. — Top, mound, and, bottom, surface runways of prairie 

 vole. Normally these are hidden in the grass but in the cases 

 shown here the grass has been burned away; the mound and the 

 maze of runways that lead to holes opening into a complex under- 

 ground system of burrows are exposed. 



