Polyphaenis sericata
In 3 days ~20% in a week ~30%
Polyphaenis sericata, the Guernsey underwing, is a moth of the family Noctuidae. The species was first described by Eugenius Johann Christoph Esper in 1787. It is found in Europe and Asia. The wingspan is 38–44 millimetres (1.5–1.7 in).
The larvae feed on various herbaceous plants, including privet, honeysuckle and dogwood. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 3 | Pyrénées National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Guernsey Underwing sighting in Cévennes National Park on a given day, based on 29 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 619th most-seen of the 996 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
June and July
In those months about 10% of wildlife watchers report a Guernsey Underwing in Cévennes National Park on a given day, against under 5% in August to May, the lowest months. Those are among Cévennes National Park's driest months, with about 60 mm of rain a month against 260 mm in October.
Between 11 pm and 2 am
Across all the parks we cover, that three-hour window holds the most Guernsey Underwing sightings with a recorded time, and about 9 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Yes
Of the 3 parks where we can rate Guernsey Underwing sightings, Cévennes National Park has the highest daily chance: about 10%. Next come Sierra de Guadarrama National Park (Spain, about 10%) and Pyrénées National Park (France, under 5%).
Same family: Noctuidae
The closest relatives of the Guernsey Underwing that you can see in Cévennes National Park (family Noctuidae, Cutworm Moths and Allies) are The Latin (about 10%), Treble Lines (about 10%) and Heart And Dart (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Guernsey Underwing is recorded against all the insects logged in Cévennes National Park (29 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.
