During the winter, bees depend upon the condensation on the walls for water. They use water to dilute honey.
That sounds logical, but I have NEVER seen the bees licking up any condensation.....and I've looked
I installed clear poly tops on a bunch of hives a couple years ago and monitored the winter condensation with various top/bottom entrance configurations. Lots of condensation on the clear poly tops when using bottom entrances. Never once did I see a bee "drinking" any of that condensation. Granted, I didn't watch them 24-7, but I didn't see any changes in the condensation from day to day either.
I have also fed my bees water in the middle of winter, but that is a story for another day
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