Here's my goofy question for the week. How do you know if your hive swarmed? I was minding my own business working on a ditch near my pole barn this afternoon - its bloody hot here, so when a sudden but brief icy wind came through I stood up to enjoy it - then noticed a very loud buzzing and looked up at the roofline. There were thousands of bees (well, it looked like a scene from "The Birds" just with bees) in a cloud buzzing around and then within a matter of about 5 seconds they seemed to head into or beyond my nearby tall norway spruces and disappeared. I went around there and looked and listened carefully, but there was nothing I could see, except as usual the trees had plenty of bees walking around on them (honeydew I've heard, they do it often). I then checked all 4 hives and they seemed about normal capacity for midday - I cracked their inner lids and had a peek inside to listen and look. I've just been out to check the hives again, and they are at what looks like normal capacity for a warm evening - teeming with bees, with lots of workers still coming and going. One of my online beekeeping friends said that I might not notice the swarm even being gone from a hive - is this true? In my minds eye, I've envisioned the swarm leaving the hive noticeably underpopulated. I was surprised mine would even swarm, since all 4 are new packages and they've always had plenty of room, but I know its not unheard of. So by observation can I tell if one swarmed? The other options are: a zillion bees were hanging around in those trees, like they do, and the same icy blast upset them momentarily just like it pleased me; or, there are a few thousand commercial hives within a 2 mile radius - they probably let loose every now and then themselves. What do you think?