Bibio pomonae
In 3 days ~10% in a week ~30%
Bibio pomonae, common name red-thighed St Mark's fly or heather fly, is a species of fly (Diptera) belonging to the family Bibionidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tatra National Park | 🇸🇰 Slovakia | |
| 2 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 3 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 4 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manchester | 🇬🇧 United Kingdom |
With luck
About 10% of wildlife watchers report a Red-Thighed St Mark's Fly sighting in Manchester on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 301st most-seen of the 458 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
August
In that month about 20% of wildlife watchers report a Red-Thighed St Mark's Fly in Manchester on a given day, against under 5% in September to July, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Red-Thighed St Mark's Fly sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Manchester, in our data
Manchester is the only city on Wallace's Line with enough records to rate Red-Thighed St Mark's Fly sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Red-Thighed St Mark's Fly is recorded against all the insects logged in Manchester (11 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.
