As autumn arrives each year, acorn woodpeckers in the foothills...

10/23/2014 10:48 AM EDT

As autumn arrives each year, acorn woodpeckers in the foothills begin harvesting acorns. The birds create holes in trees to store their bounty. Trees used by woodpeckers for storage are called granary trees, and may have up to 50,000 holes, each filled with an acorn.