Adults are 3 to 4 mm long, may have red eyes, though some are dark eyed, and a tan thorax. The two most visible signs of fruit fly activity would be the adult flies and the pupae. Adult fruit flies can live up to 30 days. Mexican Fruit Flies · Citrus Fruit Flies · Olive Fruit Flies · Caribbean Fruit Flies · Mediterranean Fruit. It seems like fruit flies will target any fruit that's lying around in your kitchen. The common fruit fly (Drosophila melanogaster) has long been a "model organism," To the team's surprise, the flies overwhelmingly chose to lay their eggs in citrus fruits. 12 Real Parasites That Control the Lives of Their Hosts. It has also spread into the cultivated citrus sections of the west coast of Mexico and In , live larvae were found in Pinellas County, in manzano peppers that Adult: The adult Mexican fruit fly is 7–11 mm long, or slightly larger than a . Like other Anastrepha species, A. ludens does not respond to any known sex.