As in the case of bees, teamwork is the order of the day in winter as well: Bees from the cool outdoor areas of the winter grape are repeatedly detached and fed by warmed up animals from the center. The energy for the muscle movements and thus for the heat supplies the honey, or the winter food that the beekeeper has given the bees as a substitute. "The honey is almost the fuel for the winter, " explains Rosenkranz. "Just as we bunk coal or oil for the winter, bees collect up to 20 kilos of honey for their sticks". This energy-rich food is converted into heat in the thousands of beehives.
"Even in winter, the hive is not generally closed, " says Rosenkranz. Because: "Even bees have to do it." On winter days with temperatures above twelve degrees, they leave their sticks to do so. "They do their so-called cleaning flight, " explains Rosenkranz. The insects get rid of their feces, with which they would otherwise pollute their stick. Already in the course of February, the hibernation ends slowly and the proverbial diligence of the bees is in demand again: For the new brood, the workers then collect on warm days the pollen and nectar of the first spring flowers.
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