Ants farm aphids and another species of ant farms fungus.
Parasites are ubiquitous in nature and they range from the infamous cuckoo who lays eggs in other birds’ nests to tiny worms that infest the eyes of children to the horrifying tarantula hawk wasp that paralyses a spider and leads it to a burrow and then lays an egg which soon hatches and devours the still-living spider from the inside out!
There are many parasitoid wasps, of which the tarantula hawk wasp is only one. It's an sound evolutionary strategy even if their existence even horrified Charles Darwin (and these wasps were obviously the inspiration for the Xenomorph in the Alien movies)
Parasites are ubiquitous in nature and they range from the infamous cuckoo who lays eggs in other birds’ nests to tiny worms that infest the eyes of children to the horrifying tarantula hawk wasp that paralyses a spider and leads it to a burrow and then lays an egg which soon hatches and devours the still-living spider from the inside out!