Pseudoterpna coronillaria
In 3 days ~20% in a week ~40%
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 |
With luck
About 10% of wildlife watchers report a Jersey Emerald sighting in Sierra de Guadarrama National Park on a given day, based on 18 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 182nd most-seen of the 597 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.
May–July and September–October
In those months about 10% of wildlife watchers report a Jersey Emerald in Sierra de Guadarrama National Park on a given day, against under 5% in August and November–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.
Yes
Of the 2 parks where we can rate Jersey Emerald sightings, Sierra de Guadarrama National Park has the highest daily chance: about 10%. Next come Pyrénées National Park (France, under 5%).
Same family: Geometridae
The closest relatives of the Jersey Emerald that you can see in Sierra de Guadarrama National Park (family Geometridae, Geometer Moths) are Yellow Shell Moth (about 10%), Heliothea discoidaria (about 10%) and Chimney-Sweeper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Jersey Emerald is recorded against all the insects logged in Sierra de Guadarrama National Park (18 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.
