The bees have been chewing or polishing or licking the entrance of the old hive! They are at it both day and night.
OK, the wood IS a little rough, could they be trying to smooth it out? This is the swarm living inside the cold frame wall. I placed a hive over the entrance and sealed the alternative exits because I would like them to expand into a proper hive.
I COULD order bees for the hive, of course, but this hive is strong and VERY gentle, so I see no point to ordering bees if I can get THIS hive split or whatever without ripping up the walls!
I am curious as to why they would be workig over the entrance to the old hive both day AND night!