Pseudoterpna coronillaria
In 3 days ~10% in a week ~20%
Pseudoterpna coronillaria, the Jersey emerald or gorse emerald, is a moth of the family Geometridae. The species was first described by Jacob Hübner in 1796. It is known from Spain, Portugal, the Pyrenees, western and southern France, Corsica, Sardinia, Sicily, Italy, Samos, Rhodes, Turkey, Israel, Lebanon, northern Jordan and North Africa. It has not been reported from mainland Great Britain, but is present on Jersey, where it was previously overlooked as a form of the grass emerald, until 2001 when it was correctly identified.
The wingspan is 36–40 millimetres (1.4–1.6 in). They are on wing in June and July in western Europe. The larvae feed on Genista tinctoria, Ulex species and broom. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 2 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Porto | 🇵🇹 Portugal |
Rare
Under 5% of wildlife watchers report a Jersey Emerald sighting in Pyrénées National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 869th most-seen of the 1277 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.
May and September
In those months about 10% of wildlife watchers report a Jersey Emerald in Pyrénées National Park on a given day, against under 5% in June–August and October–April, the lowest months.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Jersey Emerald sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
2nd of 2
Of the 2 parks where we can rate Jersey Emerald sightings, Pyrénées National Park ranks 2nd at under 5%. The best odds are in Sierra de Guadarrama National Park (Spain, about 10%).
GBIF citizen-science records
It is estimated from how often the Jersey Emerald is recorded against all the insects logged in Pyrénées National Park (9 verified sightings from 2019 to 2026), 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.
