Sargus bipunctatus
In 3 days ~20% in a week ~30%
Sargus bipunctatus, the twin-spot centurion, is a European species of soldier fly. Body length 10 to 14 mm. Frons less broad than in Sargus cuprarius. The mesonotum is metallic green; the abdomen brown, with a violet metallic tinge. Females have a broader build than the slender males with the base of the abdomen extensively reddish and a blackish tip bearing blue reflections. Wings slightly yellow. Red legs, tarsi brown at the apex.
Found in open and wooded habitats, sunbathing on foliage in sheltered spots. The flight period is from July to November. Females lay eggs on fresh dung, manure or in close by soil where the larvae develop. The larvae have been reared from cow dung, compost, rotting vegetation and decaying fungi. Larvae have been found in egg pods of locusts (Dociostaurus maroccanus Shnb.).
Sargus bipunctatus can be found in the Trans-Caucasus Central belt and south of Western Europe. Media related to Sargus bipunctatus at Wikimedia Commons Images representing Sargus bipunctatus at Bold Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Berlin | 🇩🇪 Germany | |
| 2 | London | 🇬🇧 United Kingdom | |
| 3 | Birmingham | 🇬🇧 United Kingdom | |
| 4 | Hamburg | 🇩🇪 Germany | |
| 5 | Warsaw | 🇵🇱 Poland | |
| 6 | Brussels | 🇧🇪 Belgium | |
| 7 | Liverpool | 🇬🇧 United Kingdom | |
| 8 | Portland | 🇺🇸 United States | |
| 9 | Manchester | 🇬🇧 United Kingdom | |
| 10 | Kyiv | 🇺🇦 Ukraine |
With luck
About 10% of wildlife watchers report a Twin-Spot Centurion Fly sighting in Portland on a given day, based on 52 verified sightings from GBIF citizen-science data. It is the 114th most-seen of the 507 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
September
In that month about 20% of wildlife watchers report a Twin-Spot Centurion Fly in Portland on a given day, against under 5% in November to August, the lowest months. That is one of Portland's driest months, with about 55 mm of rain against 250 mm in December.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Twin-Spot Centurion Fly sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 17 cities where we can rate Twin-Spot Centurion Fly sightings, Portland ranks 8th at about 10%, level with the leaders once rounded. The best odds are in Berlin (Germany, about 10%), London (United Kingdom, about 10%) and Birmingham (United Kingdom, about 10%).
GBIF citizen-science records
It is estimated from how often the Twin-Spot Centurion Fly is recorded against all the insects logged in Portland (52 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.
