Bees washboarding

I have noticed over the last three weeks that bees have been washboarding out the front of hives. Here is a photo of them washboarding on the front of the Modified Dadant hive.

Interestingly, it’s about the same time as last year that I posted this washboarding video of the front of the Flow hive.

Anyone else seeing this behaviour in Canberra at this time of year?

Hi there, mine (?) are doing that but on the inside of the box wall. It’s a very simple box with a hole basically, no frames. So what are they actually doing?

Ian, there is no real certain answer, good summary here: