Sometimes when I'm too knackered to inspect the beehives properly I just sit and watch the bees coming and going. If there's a flow on, helper bees wait for the foragers at the entrance so they can take on the nectar load (bees have a large "honey stomach" separate from their regular stomach) and carry it to storage. There might be a "waggle dance" on the landing board if someone has found a good spot. It's very soothing to watch.