I have noticed a lot of great tit activity close to the hive and I am not sure if they are taking dead bees, catching live ones on the landing board, or just generally 'hanging out' in the area.
I read something about bees and beekeeping every day. Retaining the information and applying it is the next trick. Today I read about 'tanging' which seems to relate to beating a drum to claim a swarm as yours, warn local people that there is a swarm about and most curiously the sound is also supposed to lure the swarm back to a hive ........ hm I am not yet confident to gather a swarm and suspect that hitting a metal lid with the hive tool will be as annoying to the neighbours as the swarm itself. More reading needed.