How do bees spend winter?

A bee can't survive the cold winter, but a swarm of bees is different. It is said that the bees in the hive often huddle together to keep warm when they want to spend the winter. The outermost layer is worker bees, flapping their wings desperately to keep out the cold like thick clothes. Under such a tight "package", the temperature in the hive is constant at around 13 degrees Celsius, which is as comfortable as spring. Not only queen bees and drones, but also other worker bees are "wrapped" by worker bees. Hungry, they get enough energy by eating honey collected in summer. But the worker bees inside will not stay inside all the time, and they need to "change jobs" with the worker bees outside to save everyone's physical strength. In this way, the bee family spent the winter.