May 22nd of this year, 2019, I observed the bees in one of my swarm traps exhibiting this unusual behavior. The experts don’t have a definitive answer for the behavior. Click on the link.
https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=7586
I have seen it 3 or 4 times with my hives over the past 6 years. One common observation on my part is that I see it exclusively in the afternoon on warm days. I really to log the activity to see if there are some commonalities. The washboarding activity really is fascinating to watch. Below is the slomo video I took that afternoon.
Fascinating…..these creatures are so fascinating. I can spend literally hours just watching them come and go.
TTFN
Bishop