Bibio lanigerus
In 3 days ~20% in a week ~40%
Bibio lanigerus is a species of fly in the family Bibionidae. It is found in the Palearctic. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Shaggy St Mark’s Fly sighting in Boston on a given day, based on 95 verified sightings from GBIF citizen-science data. It is the 179th most-seen of the 1200 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
May
In that month about 20% of wildlife watchers report a Shaggy St Mark’s Fly in Boston on a given day, against under 5% in June to March, the lowest months.
Only Boston, in our data
Boston is the only city on Wallace's Line with enough records to rate Shaggy 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 Shaggy St Mark’s Fly is recorded against all the insects logged in Boston (95 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.
