Locust Blowfly - Stomorhina lunata

Alternative names
Musca lunata

A distinctive mid-sized blowfly which is sometimes mistaken for a hoverfly or Muscid. It has a three dark stripes on the thorax and a strongly protruding lower face. Tergites 3 and 4 (apparent 2 and 3) have orange patches on the side in males, or grey dust patches in females. 

Similar Species

Due to similar basic form and sexual dimorphism, it can sometimes be mistaken for The Face Fly (Musca autumnalis).

Identification difficulty

Adults are usually observed on umbellifers and other flowers.

When to see it

June to October.

Life History

The larva of Stomorhina lunata is a predator of the egg pod of Acrididae (locusts). It is not thought that the species can use any British grasshoppers so UK records are all considered vagrants.

UK Status

Once considered rare but now becoming more frequent in southern England. Found as far north as Lincolnshire and Nottinghamshire.

VC55 Status

Believed to be rare in VC55. The record from Narborough Bog is the first for VC55.

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map