During winter 2011, I wrapped my honeybee hives with insulated styrofoam to help keep the hives warm.
Bees winter over by grouping themselves in the hive center keeping the hive at their favorite 90F temperature. Some colonies die when temperatures get so cold they can't move their wings to get to the surrounding honey stored towards the outside edges of the hive.
The styrofoam isn't pretty. The day before Christmas, two junkers came by and offered to haul off the" two white refrigerators" they saw sitting in my garden. After they left, I quickly made honeybee stockings for each hive just in case Santa Claus might pass them by.
From all of us at, and in, Mildred hive,
May you have a warm and sweet Christmas.