A fly that deposits its parasitic, flesh-eating offspring inside cows has been detected in Texas for the first time in decades, the U.S. Department of Agriculture (USDA) reported Wednesday (June 3).

Here's what to know about the New World screwworm (Cochliomyia hominivorax), a pest that was eradicated from the U.S. in the 1960s.

What is the New World screwworm?
New World screwworms are parasites that feed exclusively on the living flesh of warm-blooded animals, according to the American Society for Microbiology (ASM). The screwworms are the larvae, or maggots, of adult C. hominivorax flies...