Zombie Snails – (modified host behaviour)

How a zombie snail is formed is truly fascinating.

A parasitic worm called Leucochloridium needs a host — a host is a body a parasite can live in and take control of. For this worm, that body belongs to a snail. which attracts the birds that eat them. Eventually the bird 'poops' out the parasite onto leaves. Eventually a snail will the poop and eat it becoming a zombie for the cycle to repeat over and over ....

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ADVANCED CIVILIZATION Reference material - https://interestzine.com/modified-host-behavior/