Chloromyia formosa
In 3 days ~10%
Chloromyia formosa is a species of soldier flies belonging to the family Stratiomyidae. Another name for it is Broad centurion. This species is present in most of Europe (Austria, Belgium, Bulgaria, Czech Republic, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, Netherlands, Norway, Poland, Russia, Spain, Sweden, Switzerland, United Kingdom), in the Near East, in the Nearctic realm, and in North Africa.
These flies mainly inhabit wooded areas, hedge rows, moist forests, wet meadows, parks and gardens. Chloromyia formosa can reach a length of 7.3–9 millimetres (0.29–0.35 in) and a wing length of 6–7 millimetres (0.24–0.28 in). Their body is elongated, the thorax is metallic green, the head is hemispherical without hair, while the eyes are quite hairy. Antennae are short, the first antennal segment is longer than the second. The legs are black, only the knees are yellow. The abdomen is flattened and broad.
An evident dimorphism exists between the males and the females of this species. In females the abdomen is blue-green with a purple sheen (depending on the light), while in males it shows a copper-green sheen... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 3 | Pyrénées National Park | 🇫🇷 France | |
| 4 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 5 | Wadden Sea National Park | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Broad Centurion Fly sighting in Toronto on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 1296th most-seen of the 1689 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Broad Centurion Fly in Toronto on a given day, so our monthly data shows no clear season.
Between 5 and 8 pm
Across all the parks we cover, that three-hour window holds the most Broad Centurion Fly sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
38th of 38
Of the 38 cities where we can rate Broad Centurion Fly sightings, Toronto ranks 38th at under 5%. The best odds are in Turin (Italy, about 20%), Liverpool (United Kingdom, about 20%) and London (United Kingdom, about 10%).
GBIF citizen-science records
It is estimated from how often the Broad Centurion Fly is recorded against all the insects logged in Toronto (7 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.
