Sounds like you have a queen in there .
Still haven't had a chance to extract the super of honey I pulled , got a call from a freind that's dozing the cedars on his place and they found a bee tree , didn't push the tree . The tree is a dead blackjack and looks to have a good sized colony in it , a bit mean right now but that may be due to loosing the cedar that shaded them , I sujested leaving it be for now and my brother mentioned maybe cutting the top off just above the cavity and putting a board over it to keep the tree standing longer , that got us to thinking about adding supers on top that we could rob honey with , the owner was quite happy with that idea and even offered to bring a backhoe or lift out to work off from .
The tree would be easy to get with the backhoe there , could cut the top off and tie a chane on and cut it off at the ground and lay it over gently to open it up .