Bug FAQSieve-winged Snailkiller
Coremacera marginata · Order: Diptera · Family: Sciomyzidae
The sieve-winged snailkiller is a small fly about 7 to 10 mm long. It has a slender dark-grey body, reddish eyes, brown-yellow forward-pointing antennae with a hairy third segment and a whitish arista, and dark grey wings with greyish spots. Adults feed on nectar or dew, while the larvae prey on land snails.
Source: Wikipedia
How to recognize it
The fly’s body is slender and dark greyish. Its eyes are prominent and reddish. Antennae are brown-yellowish, point forward, have a hairy third segment and a whitish arista. Wings are dark grey with mottled greyish spots.
Source: Wikipedia
Size
Adults grow to 7 to 10 mm (0.28 to 0.39 in) in length.
Source: Wikipedia
Where it lives
They can be found in grasslands and woodlands.
Source: Wikipedia
What it eats
Adults feed on nectar or sip dew. Larvae prey on several terrestrial snail genera.
Source: Wikipedia
Life cycle
Adults reach a length of 7 to 10 mm.
Source: Wikipedia
Where it comes from
The species occurs across most of Europe and the Near East.
Source: Wikipedia
More photos
Same family (Sciomyzidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Coremacera_marginata
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-23 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-22.