Charles Q. Choi writes in the April 2009 issue of Scientific American that a species of dung beetle has gone from scavenging for poop to preying on other bugs. The eight-millimeter-long nocturnal Deltochilum valgum:
... devours millipedes up to 13 times larger than itself. The beetle kills by wrapping its legs around a victim, wedging its serrated head between the prey's segments and then ripping the body apart. The head of this species is unusually narrow for dung beetles -- all the better to burrow inside a corpse to dine on the innards ...
Choi's blurb isn't online yet, but the original report is available at Biology Letters.
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