I have a 2-deep Langstroth hive with a medium honey super with drawn frames above a queen excluder. The bees showed little interest in the honey super until about a week ago.
Yesterday there were a few hundred bees working the honey super. Today there are thousands. It's virtually overflowing.
It's been too cold for orientation flights for the past few days, so my first thought was young bees with nowhere to go but up.
My second thought was, bees gorging themselves on honey in preparation for swarming.
Either way I plan to check for swarm cells tomorrow and add another deep or medium super. Before I dig in, though, any thoughts on what's going on? I've never seen so many bees show up in the honey super so suddenly.