We bought our house in fall '08 with a strong colony of honeybees in the garden shed. They came back last summer and swarmed (it was this AMAZING sight that got me interested in bees). I saw evidence of them in early spring - a few dead bees in the snow during a thaw, and what I thought was bee poop- but since it's gotten truly warm, nothing. Thought they left. Until today, when there were hundreds buzzing around and in and out of the old wooden shed. What is the deal?!?!