I'm pretty sure Temp is the reason they are flightless. The thing is, it's gotten COOLER out, I live in Wisconsin and we arent running the heat yet. But I thought they flew if they were too warm. I have no idea, I'm just very frustrated at the moment to lose 4 cultures. I don't culture myself, so that's $40 of fairly new cultures ruined. I might have to start though because I'm really annoyed.