>>43539085changes:
resistence to poison (based in the resistence to insecticides, radiation,there are even species that eat poisonous plants to obtain these toxins )
weakness to ice (most species do not support climate change)
inmmunity to fairy (in almost every story there seems to be a pact of non-aggression between fairies and vermin)
super efective against ghost (many bugs are scavengers that devour corpses and for this the ghosts still fear them, just think of the metaphor they used in beetlejuice)