The sphaerocerid fly is very similar in habits and feeding patterns to phorid flies and fruit flies. However, sphaerocerid flies are shiny and black in coloration, with powerful, large-segmented legs. They measure approximately 1 to 5 mm long.
Sphaerocerid flies are also referred to as dung flies, due to their penchant for feeding on and breeding in feces. Dung flies are commonly found in locations near large animal populations, such as farms, racetracks and chicken facilities. These flies may make their homes in fresh dung or in forgotten, moldering manure.
Dung flies do not feed on blood and rarely cause irritation in animals. However, their presence does pose sanitation risks. Contact your local pest control professional to discuss prevention and extermination options.