I use the following method for catching high swarms: Get a pole that will reach the swarm. I use a telescoping paint roller handle that extends about 20 feet. To this attach a 5 gallon bucket or similar size basket. Place a frame of unsealed brood and raise it to make contact with the swarm. Brood is like a magnet to bees and they will quickly move into the bucket to cover the brood. In an hour or less you will have captured virtually all the bees, both those clustering and the returning scouts. Lower the bucket and place the frame of brood in a hive. The bees will enter the hive and set up housekeeping immediately. Farnk Humphrey