but also it could have been the first time the colony has swarmed in donkeys.
There are many triggers for swarming, hardly any are due to 'genetics' I bet the majority are down to poor management.
I would like to throw my 10 cents worth here....
This is from what I have seen with my colonies and local bees... Perhaps different on your side of the pond?
Small wild colonies with limited space swarm often here- as do abandoned bee hives...
Larger colonies with unlimited and
IDEAL space tend to just get bigger and bigger and actually become quit dangerous...
Swarming in my opinion it is a result of Poor management to a degree, but, queen excluders also play a big role, a very productive queen with a good forage available for workers will outgrow a brood box quickly often catching the keeper unaware... Especially if she is unable to find open comb and lay..
I no longer use Q excluders and only use brood deeps as supers... If I dont have the time to attend to an apiary and things get out of hand I have found that the queen will move up to the middle 3 or 4 frames in box No2... - Colony becomes a double brood and has a good supply of stores... Win Win
Come spring, rotate boxes and go on.
I also have a lid fitted with an addition 40mm of space,,, the minute I see comb being started here I will crack open the bottom and look for swarm cells...
That 40mm helps me a lot...
This is what I would prefer calling a "Supervised Neglect" approach to bee keeping... is it perfect = No - But it works for me...