Leucochloridium, a parasitic worm that invades a snail's eyestalks, where it pulsates to imitate a caterpillar. The worm then mind-controls its host out into the open for hungry birds to pluck its eyes out.

Leucochloridium, a parasitic worm that invades a snail's eyestalks, where it pulsates to imitate a caterpillar. The worm then mind-controls its host out into the open for hungry birds to pluck its eyes out.