Thera britannica
In 3 days ~20% in a week ~40%
The spruce carpet (Thera britannica) is a moth in the family Geometridae. The species was first described by Alfred Jefferis Turner in 1925. It is a double-brooded species, meaning it has two broods in one year. Its wings are coloured with different shades of grey, but the spring brood tends to have more brown colours. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Cairngorms National Park | 🇬🇧 United Kingdom |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | Birmingham | 🇬🇧 United Kingdom | |
| 3 | London | 🇬🇧 United Kingdom | |
| 4 | Manchester | 🇬🇧 United Kingdom |
With luck
About 10% of wildlife watchers report a Spruce Carpet sighting in Liverpool on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 325th most-seen of the 632 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.
October
In that month about 30% of wildlife watchers report a Spruce Carpet in Liverpool on a given day, against under 5% in July–August and December–March, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Spruce Carpet sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 4 cities where we can rate Spruce Carpet sightings, Liverpool has the highest daily chance: about 10%. Next come Birmingham (United Kingdom, about 10%) and London (United Kingdom, under 5%).
GBIF citizen-science records
It is estimated from how often the Spruce Carpet is recorded against all the insects logged in Liverpool (16 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.
