Geomyza tripunctata
In 3 days ~20% in a week ~50%
Geomyza tripunctata is a species of fly in the family Opomyzidae. It is found in the Palearctic. May to November. A herbicole found in grassland and cereal fields. Common throughout Europe. Norway and Lapland Siberia. Algeria.Tunisia. Found up to 2.300 m. The larvae tunnel in the stems of grasses and cereal. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Lisbon | 🇵🇹 Portugal |
With luck
About 10% of wildlife watchers report a Cereal Fly sighting in Sierra Nevada National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 330th most-seen of the 479 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
July and August
In those months about 20% of wildlife watchers report a Cereal Fly in Sierra Nevada National Park on a given day, against under 5% in May and September–March, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Cereal Fly sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Sierra Nevada National Park, in our data
Sierra Nevada National Park is the only park on Wallace's Line with enough records to rate Cereal Fly sightings: about 10% of wildlife watchers there report one on a given day.
Same order: Diptera
The closest relatives of the Cereal Fly that you can see in Sierra Nevada National Park (order Diptera, Flies) are Common Drone Fly (about 20%), Hornet Mimic Hover Fly (about 20%) and Dryomyia lichtensteinii (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cereal Fly is recorded against all the insects logged in Sierra Nevada National Park (10 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.
