I have just opened one of my beehives to find that there were very few bees inside, like maybe 20-30, I assumed that they had absconded as the hive had fallen over (yet remained in one piece) due to high winds and I just picked it right back up. But as I was looking over the comb, I saw the queen on the one frame, as well as some brood and lots of honey and pollen as well. There were no dead bees at the entrance or on the baseboard. I have no idea where the bees went or why they left the queen. This was a relatively strong hive a couple months ago. Any ideas?