Epirrhoe alternata
In 3 days ~10% in a week ~20%
The common carpet or white-banded toothed carpet (Epirrhoe alternata) is a moth of the family Geometridae. The species was first described by Otto Friedrich Müller in 1764. It is found throughout the Palearctic and the Near East. In North America it ranges across the northern tier of the United States plus every province and territory of Canada. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 3 | Aigüestortes National Park | 🇪🇸 Spain | |
| 4 | Wadden Sea National Park | 🇩🇪 Germany | |
| 5 | Białowieża National Park | 🇵🇱 Poland | |
| 6 | Triglav National Park | 🇸🇮 Slovenia | |
| 7 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 8 | Pyrénées National Park | 🇫🇷 France | |
| 9 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 10 | Cévennes National Park | 🇫🇷 France | |
| 11 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | Helsinki | 🇫🇮 Finland | |
| 3 | Berlin | 🇩🇪 Germany | |
| 4 | Prague | 🇨🇿 Czechia | |
| 5 | Manchester | 🇬🇧 United Kingdom | |
| 6 | London | 🇬🇧 United Kingdom | |
| 7 | Porto | 🇵🇹 Portugal | |
| 8 | Birmingham | 🇬🇧 United Kingdom | |
| 9 | Nizhny Novgorod | 🇷🇺 Russia | |
| 10 | Hamburg | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Common Carpet Moth sighting in Portland on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 378th most-seen of the 507 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Common Carpet Moth in Portland on a given day, so our monthly data shows no clear season.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Common Carpet Moth sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is seen both by day and at night.
27th of 28
Of the 28 cities where we can rate Common Carpet Moth sightings, Portland ranks 27th at under 5%. The best odds are in Liverpool (United Kingdom, about 20%), Helsinki (Finland, about 10%) and Berlin (Germany, about 10%).
Same family: Geometridae
The closest relatives of the Common Carpet Moth that you can see in Portland (family Geometridae, Geometer Moths) are Brown-Lined Looper (about 10%), Tissue Moth (about 10%) and Small Dusty Wave (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Carpet Moth is recorded against all the insects logged in Portland (9 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.
