Coremacera marginata
In 3 days ~10% in a week ~20%
Coremacera marginata is a species of fly in the family Sciomyzidae, the marsh flies or snail-killing flies. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 2 | Cévennes National Park | 🇫🇷 France | |
| 3 | Wadden Sea National Park | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Sieve-Winged Snailkiller sighting in Wadden Sea National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 699th most-seen of the 818 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Sieve-Winged Snailkiller in Wadden Sea National Park on a given day, so our monthly data shows no clear season.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Sieve-Winged Snailkiller sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 3
Of the 3 parks where we can rate Sieve-Winged Snailkiller sightings, Wadden Sea National Park ranks 3rd at under 5%. The best odds are in Bavarian Forest National Park (Germany, about 10%) and Cévennes National Park (France, under 5%).
GBIF citizen-science records
It is estimated from how often the Sieve-Winged Snailkiller is recorded against all the insects logged in Wadden Sea National Park (5 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
