screwworm fly
By releasing sterile male screwworm flies, scientists were able to eradicate the devastating pest after World War II—and they’ve been able to control the fly once again after it re-emerged in 2016. The sterile male screwworm fly (Cochliomyia hominivorax) pictured above is marked with a numbered tag to study dispersal, behavior, and longevity. (Photo credit: Peggy Greb, USDA Agricultural Research Service, Bugwood.org)