Dinera grisescens
In 3 days ~10% in a week ~20%
Dinera grisescens is a species of fly in the family Tachinidae. Canada, Kyrgyzstan, Tajikistan, Uzbekistan, China, British Isles, Czech Republic, Hungary, Moldova, Poland, Romania, Slovakia, Ukraine, Denmark, Finland, Norway, Sweden, Bosnia and Herzegovina, Bulgaria, Italy, Portugal, Serbia, Spain, Austria, Belgium, France, Germany, Netherlands, Switzerland, Mongolia, Russia, Transcaucasia. Wikipedia →
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Dinera grisescens sighting in London on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 971st 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 Dinera grisescens in London on a given day, so our monthly data shows no clear season.
2nd of 2
Of the 2 cities where we can rate Dinera grisescens sightings, London ranks 2nd at under 5%. The best odds are in Warsaw (Poland, about 10%).
Same family: Tachinidae
The closest relatives of the Dinera grisescens 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 Dinera grisescens is recorded against all the insects logged in London (13 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.
