There are four seasons in Graal Classic, separated into 3 months each. Each season has different bugs that spawn/don't spawn. Fall started on September 1st. There are no more ladybugs, grasshoppers, and dragonflies. There still are mantises but I the spawn rate is significantly lower (I'm 99% sure of this. In the summer I was catching em like crazy. Lately, not as much). And some of the butterflies also differ, but I could say exactly which differ from summer to fall. I can tell you there's less. Summer has the most bugs (which makes logical sense).