Stable Fly

Stomoxys Calcitrans


It is medium in size (body 7 mm long) and appears during the second half of summer close to stables and near cattle, as the larvae grow in manure. It has a shiny black horn, a little longer than the head and very sharp.

Living Areas

It is a common fly species in the country, in stables, sheep pens or stalls where there is an abundance of manure and dung in which it lays eggs that become coprophagous larvae. It is now better known as the stable fly.


Larvae: Decomposing organic matter. Adults: Organic liquid with a preference for sweet or fermented materials.


Stomoxys calcitrans bites and feeds on blood in the adult stage (painful bite for both humans and animals).

Life Cycle

The female lays its eggs in manure or droppings. The coprophagous maggots mature in 10 to 80 days depending on the temperature.