Texas is gearing up for war as a savage, flesh-eating fly appears poised for a US invasion and is expanding its range of victims.

On Friday, the Texas Department of Agriculture announced the debut of TDA Swormlure, a synthetic bait designed to attract the flies with a scent that mimics open flesh wounds, which are critical to the lifecycle of the fly, called the New World Screwworm. The parasite exploits any open wound or orifice on a wide range of warm-blooded animals to feed its ravenous spawn. Female flies lay hundreds of eggs in even the tiniest abrasion. From there, screw-shaped larvae—which give the flies their name—emerge to literally twist and bore into their victim, eating them alive and causing a putrid, life-threatening lesion. (You can see a graphic example here on a deer.)

The new lure for the flies is just one of several defense efforts in Texas, which stands to suffer heavy livestock losses from an invasion. Screwworms are a ferocious foe to many animals, but are particularly devastating to farm animals.

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