Small Dung Fly, Sphaerpcerid
Small dung flies are very small, blackish or brownish flies that breed in manure and other decaying materials. They often occur in large numbers in poultry manure, but generally are not a nuisance on the farm or in nearby communities. Sphaerocerids are among the first arrivals at new manure. Adult sphaerocerids forage over a broad range of manure moisture content, but they predominate at the peak of the manure cone where moisture content is higher. Larval development occurs where moisture exceeds 50 percent.