First the garden filled with bees which I thought was the mating flight. There seemed to be drones but also many workers. Then the bees gathered into a swarm cluster at the top of a ti tree (about 5m up). I was desperately attaching a bucket to a stick as the ladder wouldn’t reach, but then looked up to find them vanished. Either this was what is described as a mating swarm, where the virgin queen stops for a rest on a branch before returning to the hive with a number of workers having excitedly following. Or they cast a swarm with a virgin queen which moved off very quickly and I lost them. If so, they only clustered for about 10 min which seems a bit unsporting.