Many parasites alter their hosts behavior by small manipulations in the brain that go largely unnoticed by the host until its eaten by another. But not all use so much finesse. This week's parasite is probably the rudest as far as mechanisms go - luckily, their hosts are cockroaches, so we don't hold it against them.
I'm talking about the Emerald Cockroach Wasp. As with many parasitic wasps, it needs to inject its eggs into the host to incubate. When the eggs hatch, they'll feed on the host, cocoon, and emerge adult wasps. But most parasitic wasps paralyze their hosts and drag the bodies…
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