Yes and yes.
A crowded mated queen right colony in a min nuc will swarm. I had one of my over wintered apideas do it recently. They took up residency in an empty 14x12........think they were trying to tell me something !
S
Apidea to 14 x 12 !! they were not "telling" you they were shouting at you lol
Agree with your "yes and yes" trying to find a swarm the size of a tennis ball is a challenge too .
I have heard of them absconding more than swarming.
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