I think we might have bumble bees nesting in the ceiling at our cabin. The other night we heard lots of scratching overhead. We thought it was our resident bats. Fearing the worst, I went outside to see if I could hear anything from there. When I returned, I thought I let a bumble bee inside. I shooed it out the sliding glass door. About fifteen minutes later we heard faint buzzing. Then another bee emerged from under the ceiling tiles. Then half an hour later another. In the morning there was a fourth bee. All four left by the door, then no more. I am wondering if these were the first workers to emerge from the nest. Will the queen die if they do not return? I guess if things get bad we can remove the ceiling tiles to get at the area. Any suggestions?