Squirrels are foragers who do not hibernate in the winter.  They are known for their food-saving behaviors, which are classified as "scatter-hoarding", meaning they make many small caches of food in different areas.  These can be temporary, for the squirrel to return to within hours or days to collect and re-hide somewhere more secure, or can be much longer term.  Squirrels can bury or hide food stores and still find them months later--they have very highly developed spatial memory, which referrs to near and distant landmarks to relocate their food stores.  Adult squirrels are believed to store food in several thousand different places each over the course of a gathering season.