I'm hoping someone with experience can explain this to me, because I feel like I'm missing something. It sounds like you can take a frame of bees and brood from a hive, minus the queen, and simply drop it into a new hive and they will stay there and make it their home. Why don't they just fly out and go back home? I've also got the impression you can do this with just bees (no brood) - is that true? If I shake some bees into a new box, will they stay there? And if I had a weak hive, with a queen, is there some way to get new workers to "move in" with that hive, and accept that queen over their original one? In general, what are the conditions that cause the bees to abandon their previous home and accept a new hive?