Weird thing happened. I caught a swarm that was on the lawn of a private house right next to a golf course - literally. Walked right into my box with a couple of honey frames from one of my colonies that died over the winter. Brought them to my back yard (no other hives, temporary placement). The next day numbers of them were lying on the ground, writhing on their backs. And the numbers of these increased over the hours.
I never experienced something like this. I'm thinking they go into some pesticide on that lawn or somewhere on the golf course - or maybe around here. I doubt it because it's mostly been raining - hard. Could it be something in my honey? Viruses do not kill that fast, do they? I just can't figure it. I looked inside and bees are starting to make comb and carrying on normally.
I took a video but it's too big a file to attach. Ideas?