They have some cool tricks up their sleeves, like huddling together in a “winter cluster” and flexing their flight muscles to generate heat.Research shows that these tactics alone can keep a bee colony alive even in freezing temps.
The first factor is heat conservation without suffocation. Bees need ventilation even in winter, so you can’t completely seal off their hive. Proper ventilation prevents condensation from building up inside the hive and freezing, which could potentially harm or kill your bees.