Stegania trimaculata
In 3 days ~40% in a week ~60%
Stegania trimaculata, the Dorset cream wave, is a moth of the family Geometridae. It is found throughout Europe and India, mainly in Southern Europe, also in Borneo. The wingspan is 26–28 mm. The length of the forewings is 10–13 mm. The moth flies in two generations from May to September [1].
The larvae feed on various species of poplar. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 2 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 3 | Cévennes National Park | 🇫🇷 France | |
| 4 | Pyrénées National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Dorset Cream Wave sighting in Porto on a given day, based on 128 verified sightings from GBIF citizen-science data. It is the 34th most-seen of the 498 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 60%, if each day is a fresh chance.
April and July–August
In those months about 20% of wildlife watchers report a Dorset Cream Wave in Porto on a given day, against under 5% in January and October, the lowest months. Those are among Porto's driest months, with about 40 mm of rain a month against 140 mm in January.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Dorset Cream Wave sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Yes
Of the 8 cities where we can rate Dorset Cream Wave sightings, Porto has the highest daily chance: about 10%. Next come Turin (Italy, about 10%) and Essen (Germany, about 10%).
Same family: Geometridae
The closest relatives of the Dorset Cream Wave that you can see in Porto (family Geometridae, Geometer Moths) are Double-Striped Pug (about 20%), Vestal (about 20%) and Pale Oak Beauty (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Dorset Cream Wave is recorded against all the insects logged in Porto (128 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.
