Its a little early but we are having a January thaw. The bees are making the most of it and taking voiding flights (remember those little gold spots in the snow!)
Bees are encouraged by the bright sunshine to get a little fresh air outside the hive. The warm temperature, 34F when picture was taken, creates a warm microclimate on the face of the hive. Based on the thermometer on the side of my house the face of the hive is probably about 60F!
Here is one of those little golden spots where a bee voided. Unfortunately, many of the bees do not make it back to the hive entrance. Are these chilled bees or old bees self-sacrificing themselves? Sometimes the bees also land directly in the snow to sip a little water.