Ancylis diminuatana
In 3 days ~10% in a week ~20%
Ancylis geminana, the festooned roller, is a moth of the family Tortricidae. It was described by Edward Donovan in 1806. It is found in most of Europe and has also been recorded from North America. The habitat consists of fens, marshes and damp heathland.
The wingspan is 14–20 mm. The head is pale pinkish ochreous or white. The forewings are red-brownish [or ochreous or grey], more or less streaked with blackish in disc posteriorly. The costa is strigulated and anteriorly broadly suffused with whitish. There two or three elongate black subcostal dots towards base. The dorsal area is suffused with whitish, limited by a whitish line forming a subtriangular projection in the middle and a flat arch posteriorly, ending on the termen above middle. The hindwings are light grey. Julius von Kennel provides a full description.
Adults are on wing from May to August. The larvae feed on Salix species, including Salix aurita, Salix repens and Salix cinerea. They live between leaves spun together with silk. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Montreal | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report an Ancylis diminuatana sighting in Montreal on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 842nd most-seen of the 926 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 Ancylis diminuatana in Montreal on a given day, so our monthly data shows no clear season.
Only Montreal, in our data
Montreal is the only city on Wallace's Line with enough records to rate Ancylis diminuatana sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Ancylis diminuatana is recorded against all the insects logged in Montreal (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.
