I'm a big fan of science journalist Carl Zimmer. I get ideas for drawings and comics every time he posts on his blog, The Loom. Last week he blogged about a fungus which turns an ant into a zombie that marches 25 cm up a plant, turns to the northwest, and bites a leaf vein. Then the fungus grows a stalk that shoots out of the poor little ant's head and produces spores that rain down on the jungle floor below, to infect more ants. What an evil little fungus.
Here's a quick drawing based on the story.