Today around 3pm I checked one of my swarm traps and there was a large swarm just starting to converge on it. There was a big ball of bees on the ground and they were starting to cover the trap, which is in a tree. After about 45 minutes the ball of bees was gone from the ground, and the trap was completely covered, with a cluster the size of a football hung off the bottom, below the entrance hole. The trap has 5 frames in it but is 19 inches deep. It's been about 6 hours and they have made it through a thunderstorm. The football sized cluster of bees is still hanging on the bottom of the trap, below the hole. Are they just taking their time getting inside? There are definitely bees inside - lots of them. Could they be out of room?
Another interesting behavior I noticed is that when the trap was covered in bees, some of them sat on top, Nasanov glands in the air, fanning for their sisters. Others were on the front of the trap, doing waggle dances. What are they giving directions to once they have found their new home but haven't gone inside yet?
This is the first swarm I have ever observed. It really is fascinating.
Here is a picture of them just starting to cluster on the bottom... entrance is in the lower right.