SQUIRRELS. 



403 



FIG. 447. SQUIRREL. 



flexible twigs and moss, leaving an opening in the upper part, which they take care to 

 cover with a sort of conical roof to keep out the rain. In this nest they pass a part of 

 the day. In the evening they are gay and full of sport, jumping from branch to branch, 

 and uttering a pretty sharp whistle. During the summer squirrels are busy in storing up 

 food for the winter. The trunk of a hollow tree is their usual storehouse, to which they 

 have recourse when fresh food grows scarce. 



FIG. 448. ROCKY MOUNTAIN FLYING SQUIRREL. 



20 2 



