Feb., 1912. Mammals of Illinois and Wisconsin — Cory. 117 



The Northern Gray Squirrel inhabits the more heavily wooded 

 portions of northern Illinois and Wisconsin. Its true home is in groves 



Black phase. Normal phs 



Northern Gray Squirrel {Sciurus carolinensis leucotis) . 



of hard wood timber, where it makes its nest both in hollow trees and 

 outside among the branches. When the latter kind is constructed, 



