Squirrels collect food in autumn.

In order to store enough food supply, use it in winter or when food is scarce.

Autumn is a relatively rich period of food resources after squirrel breeding season. Nuts, seeds, pinecones and other foods scattered on the ground will be used for chewing or digging underground for storage. Squirrels have large cheek pouches, which can be filled with food and transported back to their nests or other storage places. This behavior is called "storing grain", which helps squirrels maintain energy and survive in winter or when food is scarce.