Oxycera rara
In 3 days ~10% in a week ~20%
Oxycera rara, the four-barred major, is a European species of soldier fly. Adult body length 7 mm. Wing length 6 mm. In both male and female, the scutellum has two spines. The most diagnostic character for this species is that tergite 2 is entirely black with no markings.
In the European continent: southern England, Wales, Italy, Andorra, Austria, Belgium, Czech Republic, France, Germany, Hungary, Netherlands, Poland, Romania, Slovakia, Slovenia, Spain, Switzerland, Yugoslavia. In the African continent: Tunisia and Algeria. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom |
Rare
Under 5% of wildlife watchers report a Four-Barred Major sighting in London on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 1394th most-seen of the 1504 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 Four-Barred Major in London on a given day, so our monthly data shows no clear season.
Only London, in our data
London is the only city on Wallace's Line with enough records to rate Four-Barred Major sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Stratiomyidae
The closest relatives of the Four-Barred Major that you can see in London (family Stratiomyidae, Soldier Flies) are Broad Centurion Fly (about 10%) and Twin-Spot Centurion Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Four-Barred Major is recorded against all the insects logged in London (5 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.
