I was called today to an unusual situation: a swarm on the pavement outside a house on a fairly busy street. When I arrived the bees were like a splat on the ground. They were next to a low Privet hedge, so I suppose that they'd fallen out of that.
I spoke to the house owner and got a box. This covered the splat while I went for my swarm catching equipment. When I returned they had started to cluster on a flap beneath the box. I had brought a larger box so I carefully placed small box with bees inside the big box.
I moved the big box off the splat site and laid it on its side. The unboxed bees started to march inside. Some stayed to fan the direction to the others. It was all very orderly; very calm.
Once enough bees were inside I gently closed the flaps and took the box home. I'd spent less than 45 minutes, including getting my equipment. At home, I propped the big box next to the entrance to Hive H. When I get home they may have marched into the hive; they may have found somewhere better; or they may still be there.
The source of the swarm is unclear. I've been called to other swarms on the same road so either someone is keeping or there is a feral colony along the street. It could be either.