This swarm too is one that got stuck out overnight on a rock wall. Cool windy day here in Kansas City.
This is my set up
I scooped maybe 3 Lbs. of them into the box that already has lemongrass oil in it, but the majority of the remaining bees are in the crevice between bolders and I can't get to them. It's been an hour and about half the bees are in the box, but the others are stuck between the rocks.
Should I give them more time?
Should I breakout the vacuum?
Should I tearout the rock wall to seperate the small bolder to hunt down the queen?