306 WILD ANIMALS 
3. Winter. — How does it pass the winter? 
4. Ground squirrel’s burrow.— Though it requires considerable 
industry and patience, it is instructive to dig to the end of a ground 
squirrel’s burrow late in autumn to ascertain its length and depth. Is 
the animal down deep enough to be safe from frost? What store of food 
has it laid in? 
