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In beekeeping, a winter cluster is a well-defined cluster of honey bees that forms inside a beehive when the air temperature dips below 54 to 57 °F (12 to 14 °C). Honey bees are but a few insects that survive the winter as a hive. As the outside air temperature decreases the winter cluster becomes tighter and more compact. The bees cling tightly together on the combs in the hive. The temperature within the winter cluster remains remarkably warm regardless of the outside air temperature. Larger clusters (basketball size) have a better chance for survival than smaller clusters (softball size). The winter cluster within the hive must move throughout the winter to reach the available honey stored in the combs.

Some die off, is expected during the winter. In extended cold weather periods, the incidence of Nosema disease increases and the cluster may weaken as many bees begin dying off.

Brood nestEdit

In subtropical climates, bees may not form a winter cluster at all. Worker bees forage and queens are lay eggs almost year-round.

In the temperate zones, winter temperatures dip below 54 °F (12 °C) for extended periods. All brood rearing stops for some period during the winter. In early spring, brood rearing resumes inside the winter cluster when the queens starts to lay eggs again. Once a broodnest is established, the cluster must maintain a steady temperature between 94.1 to 98.0 °F (34.5 - 36.7 °C) inside the cluster. If the temperature in areas of the brood nest dips too low the brood dies - also called chilled brood.

ReferencesEdit

  • Basil Furgala. 1975. Chapter XVI; Fall Management and the Wintering of Productive Colonies. In: The hive and the honeybee. Dept. of Entomology, University of Minnesota, Dadant.
  • Charles D.Owens The Terminology of Wintering Honey Bee Colonies
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