[mark williams]

Seen it for years.,But never paid much attention to it.
Why do they do it? Mark,,,,,,,,

 

[Rader Sidetrack]

Perhaps what you are seeing is 'washboarding'? Some info in this thread:

http://www.beesource.com/forums/showthread.php?230659-Washboarding
particularly post #4.

 

[mark williams]

Thanks Rader: Yep,That is what I meant.instead of rubbing.Thanks again.Mark,,,,,,

 

[mdax]

Washboarding is a pretty cool beehavior!

 

[Needo]

That looked like a line dance near closing time.