Gymnosoma rotundatum
In 3 days ~20% in a week ~30%
Gymnosoma rotundatum is a parasitoid fly found in Europe and Asia. Gymnosoma rotundatum, sometimes referred to as a ladybird fly, is a small 5-6mm long fly. It has a dark thorax, golden in males, and a globular orange abdomen decorated with dark rounded markings along the midline. The base of the wings are yellow-brown.
The larvae grow as parasites of shield bugs in the Pentatomidae family. In Britain, the species is often recorded in warm dry sites, where it visits a range of open shallow flowers. British Isles, Belarus, Czech Republic, Hungary, Latvia, Lithuania, Moldova, Poland, Romania, Slovakia, Ukraine, Denmark, Albania, Andorra, Bosnia and Herzegovina, Bulgaria, Corsica, Croatia, Greece, Italy, Macedonia, Malta, Portugal, Serbia, Slovenia, Spain, Turkey, Austria, Belgium, France, Germany, Netherlands, Switzerland, Japan, South Korea, Iran, Russia, Transcaucasia, China, Japan, Taiwan. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom |
With luck
About 10% of wildlife watchers report a Ladybird Fly sighting in London on a given day, based on 56 verified sightings from GBIF citizen-science data. It is the 442nd most-seen of the 1504 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.
May to August
In those months about 10% of wildlife watchers report a Ladybird Fly in London on a given day, against under 5% in September to April, the lowest months.
Only London, in our data
London is the only city on Wallace's Line with enough records to rate Ladybird Fly sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Tachinidae
The closest relatives of the Ladybird Fly that you can see in London (family Tachinidae, Tachinid Flies) are Red Spotted Parasite Fly (about 10%), Common Tachinid (about 10%) and Phania funesta (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Ladybird Fly is recorded against all the insects logged in London (56 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.
