Agree with nonstandard and Hivemaker.
But if the bees were very quiet on the frames they could be shaken into a receiver through a funnel?
I always find loads of bees left on the hive walls, but i've never checked at night...
Also check to see if the floor is less stuck than expected; they may have used an alternative method. Some of mine need a crowbar to separate the brood and floor but some new combinations will slide easily, so conclusions should not be drawn hastily.
I reckon they are now a shook swarm on National frames or part of nucs for some dodgy sales (or the whole hive would have gone).
If any bees come back you will suspect a local thief.
The only other alternative is there was something very nasty, emanating from the extra box you put on...
RAB
But if the bees were very quiet on the frames they could be shaken into a receiver through a funnel?
I always find loads of bees left on the hive walls, but i've never checked at night...
Also check to see if the floor is less stuck than expected; they may have used an alternative method. Some of mine need a crowbar to separate the brood and floor but some new combinations will slide easily, so conclusions should not be drawn hastily.
I reckon they are now a shook swarm on National frames or part of nucs for some dodgy sales (or the whole hive would have gone).
If any bees come back you will suspect a local thief.
The only other alternative is there was something very nasty, emanating from the extra box you put on...
RAB