Checked my hive today to find no live bees at all, maybe 300 dead. They were last checked (very quickly) on Dec.22 (it was warm temps) with tons of bees and stores. Stores are all there, no mites on the bottom board or feces, no AFB, no shb, conducted an alcohol wash on the dead bees.... nothing.
Why would all the bees leave? It makes no sense.