Was 55 degrees and I saw no bees flying from my two hives. Looked inside and saw lots of honey and pollen and the bottom board (screened) was packed with dead bees. I had ut an entrance reducer on last fall, perhaps they got all clogged up in the opening? Deconstructed hives and froze honey for this spring when I hive new colonies. Any reasons why my bees would die while having a lot of food? Hives seemed fine at the end of summer. The bees didn't leave the hive, they all died inside...