Fenusella nana
In 3 days ~10% in a week ~20%
Fenusella nana is a Palearctic species of sawfly. It occurs throughout the British Isles. 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 an Early Birch Leaf Edgeminer sighting in Boston on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 1063rd 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report an Early Birch Leaf Edgeminer in Boston on a given day, so our monthly data shows no clear season.
Only Boston, in our data
Boston is the only city on Wallace's Line with enough records to rate Early Birch Leaf Edgeminer sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Early Birch Leaf Edgeminer is recorded against all the insects logged in Boston (6 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.
