Geomyza tripunctata
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Cereal Fly sighting in Lisbon on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 361st most-seen of the 441 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.
January and November
In those months about 10% of wildlife watchers report a Cereal Fly in Lisbon on a given day, against under 5% in February–October and December, the lowest months. Those are among Lisbon's wettest months, with about 85 mm of rain a month against almost none in July.
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 Lisbon, in our data
Lisbon is the only city on Wallace's Line with enough records to rate Cereal Fly sightings: under 5% 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 Lisbon (order Diptera, Flies) are Marmalade Hover Fly (about 10%), Common Drone Fly (about 10%) and Common Globetail (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 Lisbon (6 verified sightings), 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.
