I believe there is a parasite that infects snails that similarly alters their brain chemistry to drive them to reckless behaviour (if that doesn't sound too com

I believe there is a parasite that infects snails that similarly alters their brain chemistry to drive them to reckless behaviour (if that doesn't sound too comic wrt snails) such that they are more likely to be spotted and eaten by birds, thereby enabling the parasite's dispersal. In fact a hell of a lot of biology and evolution can be seen to be driven by parasitism. The book "Parasite Rex" is a good if unsettling source.