Come spring we decided to put a few bait hives around the farm to attract any passing swarms. The one hive we had last year was a swarm that moved by its own accord into an empty box we had around. A bait hive is simply a normal hive that has some form of attractor put into it and is placed in a good location from the point of view of the bees. In our case we used lemon grass oil as the attractor and used old hive boxes as they're known to prefer older wood. We scattered the hives around the farm to try and cover as much ground as possible.
Our first swarm moved into the bait box that was right next to the solar wax melter. We then moved the wax melter to the side of a second bait box. A week or two later that box started seeing a lot of bee activity. Swarms will often send scouts ahead of the swarm to look for good places to move into. We decided to setup a camera to catch the swarm moving in. We used a simple HD camera on a small tripod. These cameras are awesome value (they even record underwater) and use SD cards for storage so any cheap 32GB card will record 5 or 6 hours of video. We just set everything up around noon and left it recording. At the end of the day we went through the footage and found the key 20min where everything happened:
It was great to see the first bees land and start fanning with their butts in the air, releasing pheromones to attract the rest of the hive. This was actually a small swarm. Even today it's still a very small hive but building strongly.