My daughter was housesitting for me when I went on vacation at the beginning of August. She saw that the bees were swarming but she could not tell which hive it was or see where they ended up heading. She looked for them in the trees later but did not spot the swarm. When I returned from vacation I was sure they were long gone. 3 weeks later Gavin and I were in the hammock under the big fir tree in my backyard, and I spotted insects flying around high in the tree. Sure enough there was the lost swarm. Already building comb right there on the branch of the tree.