We had some heavy snow recently and on Jan 31, after 8" of snow and low temps (0 wind chill), I was cleaning the snow off of the hive entrance at Mid Day and six (6) bees flew out of the hive entrance and immediately fell into the snow on the ground. The bees were motionless so I gently picked them up and placed them near the entrance of the hive which was now clear of snow. This is my first year with a hive going through winter..the hive is in a sheltered area, but the heavy snow fall stil collected on the hive. I have it wrapped in tar paper and bored a hole in the upper deep near the top for added ventilation. Any ideas out there or is this normal behavior for bees?