Philereme vetulata
In 3 days ~10% in a week ~20%
Philereme vetulata, the brown scallop, is a moth of the family Geometridae. It is found in much of the Palearctic realm. The wingspan is 24–30 mm. Shiny grey-brown, both wings are traversed by numerous slightly darker wavy lines, which are angulated subcostally on the forewing; both wings with blackish discal dot above and beneath. P. vetulata generally varies very little.
There is one generation per year with adults on the wing from the end of May to August. The larvae feed on alder buckthorn (Rhamnus frangula) and are dark grey with paler stripes and orange suffusion. They can be found from the end of April to June. It overwinters as an egg. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom |
Rare
Under 5% of wildlife watchers report a Brown Scallop sighting in London on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 1300th 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Brown Scallop in London on a given day, so our monthly data shows no clear season.
Only London, in our data
London is the only city on Wallace's Line with enough records to rate Brown Scallop sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Brown Scallop is recorded against all the insects logged in London (10 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.
