This is my first winter having bees. I know our winters here are mild but I am getting concerned. I want to know if the girls are doing ok but I cannot get into the hive. Either it is too cold or I am working. Are there any external signs that somthing is wrong or everything is ok? I have seen a few flying on a day that was in the upper 40s and there have been a few dead at the entrance ( only like 10). I had SHB in this hive this year. Any advice would be appreciated.