Thanks, JP, you just answered a question for me, too.
We looked at a dead tree with a colony entrance about 30' up; the owner wants to have the tree removed. (She's a gardener and understands the importance of the bees, so when the tree removal service told her they would spray (kill) the bees, she said no).
Been trying to figure out if there is a way to get them out of there. We do understand that dropping the tree at this time of year would crush all the comb and kill the bees....