Acrobasis suavella
In 3 days ~20% in a week ~40%
Acrobasis suavella, the thicket knot-horn or blackthorn knot-horn, is a moth of the family Pyralidae. It was described by Johann Leopold Theodor Friedrich Zincken in 1818 and is native to Europe. It has been accidentally introduced and become established around Vancouver, British Columbia.
The wingspan is 22–24 mm. The moth flies in one generation from June to August on the British Isles, extending in low numbers to October in Belgium. The caterpillars preferably feed on blackthorn, Prunus spinosa, but they have also been found on Cotoneaster, Crataegus, and Sorbus. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom |
With luck
About 10% of wildlife watchers report a Thicket Knot-Horn sighting in London on a given day, based on 110 verified sightings from GBIF citizen-science data. It is the 363rd most-seen of the 1504 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.
June to August
In those months about 10% of wildlife watchers report a Thicket Knot-Horn in London on a given day, against under 5% in September to May, the lowest months.
Only London, in our data
London is the only city on Wallace's Line with enough records to rate Thicket Knot-Horn sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Thicket Knot-Horn is recorded against all the insects logged in London (110 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.
