All hives swarmed, seems unusual
I have four hives here at my house, and they have all swarmed within the last four days. Only one swarm could be retrieved, as the rest went to trees about 40 feet up. It happened after several days of cold and rain, so in the first few hours of sun - GRAND EXIT. They're Italians, and only one hive showed signs of swarm cells a couple weeks ago. They're not honey bound, they already have at least two supers on that were being worked well and the queens weren't even a year old yet. I'm mystified and frustrated. Anybody else experiencing extra swarming tendencies?