I've kept bees for years but have been spending more time near my beeyard so may be noticing the obvious. But do bees often swarm into a tree- then within an hour go back to hive??
Twice this year I've watched a swarm land. And and hour or so later go back and it's gone!
Is it just a pre-swarm or test swarm, and will officially swarm in the near future? This one today was massive, and I hope to have not lost it to the forest!