Many species resemble ants having a "waist" and glossy black body. Many Sepsidae have a curious wing-waving habit made more apparent by dark patches at the wing end. Adult flies are found mostly on animal and human excrement (less often on other rotting organic matter), where eggs are laid and larvae develop.
All images on this website have been taken in Leicestershire and Rutland by NatureSpot members. We welcome new contributions - just register and use the Submit Records form to post your photos. Click on any image below to visit the species page. The RED / AMBER / GREEN dots indicate how easy it is to identify the species, particularly from a photo. See our Photo ID page for more information.