The skill of the bee is often hidden inside the hive, but in this picture we get a glimpse. The queen failed to find the entrance to a hive while I was walking this small swarm in. So they camped outside for the night and each bee orientated to form the perfect thermal shape to minimise heat loss for the night. The next morning I gently scooped the cluster off the side wall and placed them inside. They are doing very well.
This hive is double skinned, includes a vapour barrier and insulated with lambs wool. I think the thermal engineer inside each bee will like that.