This one comes courtesy of a Junkie, but I can't remember who. If you sent me this link, please let me know in the comments below.
Seriously, how F**K YEAH! is this? As reported by National Geographic News, parasitic phorid flies not only lay eggs in fire ants, but the maggots "drive" the ants like a little insectile SUV to get it away from other fire ants (a-la Perry Dawsey's induced paranoia), eat the ant's brains and chop off the ant's head. Nature is so freakin' kick-ass it's downright awesome.
Click here to read the whole article
The larva then eats the ant's brains, causes the ant's head to fall off, then finally "hatches" from the ant's hollowed-out head about 40 days later.
"Not only is it decapitating it, but it turns the ant into a zombie," said Sanford Porter, a research entomologist with the U.S. Department of Agriculture's Agricultural Research Service.