> Or perhaps they just increase the frequency of feeding, to make sure that
brood food does not dry up as quickly as the nectar
I suspect that this is the case.
Bees typically hold broodnest relative humidity close to the equilibrium RH
for honey (~56%) at broodnest temperature.
By adapting to this RH, they don't need to continually fight humidity
thermodynamics.
Take a look at Fig. 10 in
https://scientificbeekeeping.com/observations-on-pollen-subs-part-4-nectar-water-and-humidity/
Note how the bees held different temps and RH between open brood and honey
ripening frames.
Randy Oliver
Grass Valley, CA
530 277 4450
ScientificBeekeeping.com
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