Re: In mid-MD OBH packed with bees! What to do?
Small ones can be done, I maintained a 2 frame (one above the other) observation hive for several years in the lounge of my house with the bees coming and going through a tube in the wall. It did have an artificial heat source though.
I fed it as needed, and periodically removed surplus bees by trapping them out and they would get added to some other hive. The odd time in winter they got weak also, as it was a pretty artificial set up, and I remedied that by adding bees shaken from another hive.
Essentially, observation hives are not how bees would normally choose to live, and need to be managed fairly intensively.
"Every viewpoint, is a view from a point." - Solomon Parker