What Do Honey Bees Do During a Wisconsin Winter?

As November arrives in Wisconsin, flowers disappear, temperatures drop and the activity around a beehive becomes noticeably quieter. It is easy to assume that the bees have gone dormant for the season, but honey bees don't hibernate. The colony remains alive inside the hive all winter, relying on a remarkable combination of teamwork and the food it stored during the warmer months.

When temperatures fall, thousands of worker bees gather around the queen in what is known as a winter cluster. Bees near the center generate heat by contracting their flight muscles, while those around the outside help insulate the group. As conditions change, bees gradually shift positions within the cluster. Penn State Extension describes this as a thermoregulating system that allows the colony to survive temperatures far colder than an individual honey bee could tolerate alone.

All of that heat requires energy, and that is where honey becomes especially important. The honey stored during spring, summer and fall becomes the colony's winter pantry. As winter progresses, the cluster slowly moves through the hive to reach those stores. Wisconsin's Pollinator Protection Plan notes that colonies in cold climates may require around 100 pounds of stored honey for winter, although actual needs vary by colony size, weather and other conditions.

The bees carrying the colony through winter are also different from the workers we see during summer. Colonies begin producing winter bees in late summer and early fall. While a typical summer worker may live only several weeks, winter bees can survive for months and carry larger nutritional reserves. Their longevity allows the colony to bridge the long period between the last fall flowers and the return of spring forage.

On an occasional warm winter day, you may even see bees flying from the hive. They aren't beginning a new honey harvest. Bees avoid relieving themselves inside the colony, so warmer days provide an opportunity for what beekeepers call a cleansing flight before the bees return to the hive and reform their cluster.

There is something remarkable about looking at a quiet hive surrounded by Wisconsin snow and realizing that thousands of bees are still inside. The colony may appear inactive, but the bees are consuming honey, generating heat and working together to survive until spring.

It is also a good reminder of what honey means to the bees themselves. For us, honey is something delicious to drizzle over toast or add to a recipe. For a honey bee colony, it is the stored energy that can carry an entire community through a Wisconsin winter.