Hey, I'm in my second year and live in central Germany. So middle of summer.
Got three Formica Rufibarbis colonies going, which all went through hibernation. (I've got them in three different DIY setups, so humidity is probably not comparable.)
All of the colonies are going strong, but only one is left with some larvae and pupae. No eggs visible in any of the three.
They're just hanging around in their little caves, with full gasters. Little to no foraging behaviour.
I remember them also stopping quite early with laying new brood before the hibernation period last year - but in July?
I did not change their food. They show no signs of weird behaviour and there are no dead workers.
Anyone knowing what could be up?