Why would they want to leave home?

Hopefully the urge to swarm is over - but I'm not getting complacent!
With the Queens slowing down and the frantic storing for winter it's time QB started taking surplus, capped honey.

Borage - the bees love it. Annual but self-seeds.

Lavender - another favourite.

Rosebay Willowherb has dark blue-green pollen.
With such a lot of nectar sources here, why buzz off? QBzzzzzzzzzzzzzzzzzzzzzzz