Stonemyia rasa
In 3 days ~10% in a week ~20%
Stonemyia rasa is a species of fly in the family Tabanidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Shaved Horse Fly sighting in Boston on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 888th most-seen of the 1200 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.
August
In that month about 10% of wildlife watchers report a Shaved Horse Fly in Boston on a given day, against under 5% in September to July, the lowest months.
Only Boston, in our data
Boston is the only city on Wallace's Line with enough records to rate Shaved Horse Fly sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Shaved Horse Fly is recorded against all the insects logged in Boston (7 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.
