Pammene fasciana
In 3 days ~10% in a week ~20%
Pammene fasciana, the chestnut leafroller, is a moth of the family Tortricidae. It is found in Europe and across the Palearctic. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | Birmingham | 🇬🇧 United Kingdom | |
| 3 | London | 🇬🇧 United Kingdom |
Rare
Under 5% of wildlife watchers report an Acorn Piercer sighting in London on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 1109th 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.
July
In that month about 10% of wildlife watchers report an Acorn Piercer in London on a given day, against under 5% in August to June, the lowest months.
3rd of 3
Of the 3 cities where we can rate Acorn Piercer sightings, London ranks 3rd at under 5%. The best odds are in Liverpool (United Kingdom, about 10%) and Birmingham (United Kingdom, under 5%).
GBIF citizen-science records
It is estimated from how often the Acorn Piercer is recorded against all the insects logged in London (9 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.
