Hello Birchlea
There could be a number of reasons for this and it is a question of going through the list:-
1. It is a preliminary sign of swarming preparation that the bees hang around the hive entrance. If you have done a seven day inspection you will know whether or not this is the case.
2. Are the bees short of space? We have a honey flow on here and check the supers every seven days. It could be that they are getting short of space.
3. Was it a warm night with you? The bees will hang out if they need to increase the ventilation. I take it that you have not still got the entrance block still in...... the bee colonies are now coming up to maximum strength.
4. Finally you have a strain of bees that simply likes hanging out....
We did our seven day inspection today and found one colony making preparations to swarm. The Snelgrove swarm prevention method was applied.