August 30th, 2017, in Salida, Colorado. Another late season swarm.
After the bees were put in a hive, only the inner cover (with its center hole) was put on the top of the hive body at first. This was so that the bees in the air could smell the colony and join them. A lot of the workers were fanning the Nasonov pheromone just outside the hole. The Nasonov pheromone tells the other bees in that colony "Here we are! Here we are!" How miraculous that each colony has its own distinctive smell to the Nasonov pheromone that all the bees in that colony produce!
And they were Nasonoving at the bottom entrance as well.
In this last photo you can clearly see the exposed Nasonov gland on the bee in the center. It's the white horizontal strip just above the down-turned, black point of her abdomen.