The Scathophagidae is a small family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 of Muscoidea

Muscoidea

Muscoidea is a superfamily of flies in the subsection Calyptratae....

 which are often known as "Dung-flies" although this name is not appropriate except for a few species of the genus Scathophaga

Scathophaga

The genus Scathophaga are small to medium sized predatory flies that for the most part, have larvae that feed on other insect larva within animal dung or decaying vegetable matter. Many are highly variable, sometimes producing small, infertile males that superficially resemble females...

which do indeed pass their larva

Larva

A larva is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle...

l stages in animal dung. The name probably derives from the "Common Yellow Dung-fly", S. stercoraria

Scathophaga stercoraria

Scathophaga stercoraria, known as the common yellow dung fly or sometimes called the golden dung fly. It is one of the most familiar and abundant of flies in many parts of the northern hemisphere. As its common name suggests, it is often found on mammal faeces, most notably those of horses and...

, which is one of the most abundant and ubiquitous flies in many parts of the northern hemisphere.
The larval-biology of this family is actually quite diverse including plant feeders (leaf miners, stem-borers or feeding in seed capsules), aquatic predators and predators on other insect larvae in wet situations - such as piles of rotting vegetable matter, seaweed or dung.