A Gray Squirrel climbs an oak tree, Sept. 16, 2018, Travis Air Force, Calif. A squirrel’s preparation for winter is a long process that actually begins in summer. By the time cooler weather hits in fall, it usually has already gathered and stored most of its food supply. (U.S. Air Force Photo by Heide Couch)

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Photo by: Heide Couch |  VIRIN: 180916-F-RU983-0025.JPG