Yesterday here in SW PA it was in the low 70's. A great opportunity to head out to the beeyard. Amazingly, I have bees in 8 of the 9 hives I prepared for winter (no treatment for 2 years). In the fall I suppported each hive's food stores by placing sugar on notebook paper on the top frames of each hive. I noticed that one of these hives yesterday had seemed to consume most of this sugar and was clustered in daisy chain fashion on top of the inner cover and the top bars through the opening of thhe inner cover. I placed more sugar on the inner cover. This week the predicted temps. are to decrease to the 20's and 30's. What is this behavior and what should I be looking for?