Zombie insects
The world of insects is a generally terrifying place. As the Jeff Goldblum character in The Fly says - it is a basic and brutal place. This is true. There may be debate these days as to whether or not insects or other animals have any kind of emotion, but the fact is most insect species have set orders and duties for each member of the colony or nest to do. They attack other insects for food, raid nests, kill opposing nests and defend nests with a sort of insane brutality. So