Last year my friend had a call in July about a swarm that had come from a big old tree. The cavity couldn’t bee very big. And the swarm was not big. http://www.elgon.es/diary/?p=235 But the bees in the tree survived the
MT-colony conclusion
I have shared the performance of this colony which had almost a box of plastic small cell frames and natural positioning of these frames (as the uppermost broodbox). Which also had a tough experience with mice living in the bottom