Red squirrels can be easily identified from other North American tree squirrels by their smaller size, territorial behavior and reddish fur with a white venter (under-belly). Red squirrels are also somewhat larger than chipmunks. The red squirrel is most active in the early morning and the late afternoon. It is a solitary animal, except for mothers and their young. The red squirrel makes its nests in a variety of places including hollows in the ground, in tree hollows, logs or crotches in trees. The red squirrel is very vocal and chatters, growls and screeches.