Coremacera marginata is a species of fly in the family Sciomyzidae, the marsh flies or snail-killing flies.
Subspecies include:[1]
This species occurs in most of Europe and in the Near East.[2] These flies can be encountered in grasslands and woodlands,
The adults of Coremacera marginata grow up to 7- long. These flies have a slender, dark greyish body. The prominent eyes are reddish. The brown-yellowish antennae are forward-pointing, with a hairy 3rd segment and a whitish arista. The dark grey wings are mottled with greyish spots.[3] [4]
Adults feed on nectar or sipping dew. Larvae prey on several terrestrial genera of snails.[5]