Re: strange bee activity
You have stated that the bees "crawl out on their backs?" I have a Kenyan Top Bar Hive and every day, the vast majority of my girls will tumble on their backs now and then. I have 3/4" holes drilled for their entrance and exits. Actually, I believe (as others have stated) they get in such a big hurry they just lose their footing coming and going from the hive! You have to also consider that it gets pretty busy at the entrance so you will have some colliding into each other as well. I would not worry until they end up on their backs...dead!
"Death smiles at everyone. Marines smile back!"