A Brazilian wasp has evolved a very peculiar mind-control power in order to reproduce: It induces love in a species of caterpillar. The wasp lays its eggs in a baby caterpillar, which grows normally as the eggs grow inside it. Eventually, larvae burst out of the caterpillar’s body, and that’s when things get weird. The caterpillar covers the larvae with silk, and will protect them quite violently until they are full-grown wasps (you can see that in this picture). In fact, the caterpillar refuses to eat or leave until the wasps hatch.

A group of researchers observing this Brazilian insect drama in the wild say it’s the first time they’ve been able to prove scientifically that parasites essentially mind-control their hosts to ensure the parasites’ survival.

Source: io9