I went thru my last yard today. 2 of 4 were locked & loaded & ready to launch & 1 did while I was there. . it must have launched just before I got there. there is no way I would have missed them leaving the hive but when I went to my truck I looked up & there was a swarm settling in a cedar tree. this was just after I got a call to catch a swarm near the anheuser brewery. I backed my truck under the tree & put a step ladder in the bed so I could reach them. this yard is near my house so I took the swarm home, put them in the shade, got some more empty boxes & headed to the brewery. caught that swarm, got them home, hived both swarms & got another call. off again to catch my 3rd swarm of the day.
so- EVERY strong hive I have either swarmed or tried to swarm in the last 5 days. with 2 weeks of rain I could not get into hives to check them. I've never had this many hives in swarm mode before & it's like a flu epidemic & not just my hives, it's all over the area. so while I know there are a number of things that contribute to swarm behavior i'm starting to believe that prolonged periods of rain might be another factor. I've caught 11 swarms so far this spring. luckily I have a lot of woodenware pre-fabbed. it just needs assembling. at this rate i'll be at 50 hives before long.