I would prefer not to start a discussion on the merits or otherwise of leaving the inspection tray under the OMF for the winter......
However, I have chosen to leave mine in, albeit about 5cm below the OMF. The result is that I can try to read the debris to give me some idea of what is going on inside the hive. I particular I would like to be able to spot when/if they are broodless (so I can vape them). Normally there is a scattering of bee parts, dead mites, poo, wax bits etc, in lines aligned with the frames. Today I spotted this:
View attachment 22970
Any ideas what this might mean? My first thought is that they are tearing down drone cells.