You can read all the books in the world about beekeeping, and while you can get a good idea of the fundamentals, nothing beats experience on how bees behave.
Take the photo below. I have no idea what the girls are doing. My best guess is they are fanning the hive entrance for temperature control, but they could just as well be practicing their Cirque de Soleil routine. Nothing else seems amiss, so right now I just have to assume everything is fine, and this is some normal bee behavior I haven’t experienced yet.
If anyone has any ideas, I would certainly welcome any feedback.