My neighbor just told me that this weekend he found a good quantity of comb in his backyard with honey and bees in it (unfortunately he didn't save any for me), but he was wondering if it came somehow from my hive (which it did not). He found it around the base of a big willow tree with several holes in limbs and trunk, so I'm guessing that there are feral bees in there somewhere (maybe from a swarm from my hive...). My question is, what would be getting into a hive way up in a tree at this time of year? Then only active critters we see commonly are gray squirrels - could it be them?