The 1st of December and winter is approaching. The beehives are wrapped in foam board on three sides to help keep the honeybees warm. Freezing temperatures won’t kill them if they have plenty of food to eat, but if they run out they’ll starve as there is no food outside of the hive they can get. The colder it gets the more they’ll eat as they convert calories into heat. The foam helps them to stay warm and therefore eat less.