Olethreutes arcuella
In 3 days ~10% in a week ~20%
Olethreutes arcuella, the arched marble, is a colorful small moth species of the family Tortricidae. These moths inhabit woodland, fields, hill pasture and heaths. Olethreutes arcuella has a wingspan of 14–18 mm. Forewings of these medium size moths have an orange-rufous ground colour, with some yellow patches, a few metallic blue-grey or silver-colored streaks and a wide black marking in the middle, which includes a row of three small, silver colored spots. The hindwings are brown. The caterpillars are purplish- gray to violet-brown and have a yellowish-brown head.
This species is quite similar to Olethreutes subtilana, but has rather narrower wings. This species usually has one generation (univoltine). The flight time of these day-active moths ranges between late May and August. The caterpillars feed on dead... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 2 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Novosibirsk | 🇷🇺 Russia | |
| 2 | Berlin | 🇩🇪 Germany | |
| 3 | Warsaw | 🇵🇱 Poland | |
| 4 | Munich | 🇩🇪 Germany | |
| 5 | Bucharest | 🇷🇴 Romania | |
| 6 | Kyiv | 🇺🇦 Ukraine | |
| 7 | Nizhny Novgorod | 🇷🇺 Russia | |
| 8 | Prague | 🇨🇿 Czechia | |
| 9 | Helsinki | 🇫🇮 Finland |
Rare
Under 5% of wildlife watchers report an Arched Marble sighting in Helsinki on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 665th most-seen of the 838 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.
June
In that month about 10% of wildlife watchers report an Arched Marble in Helsinki on a given day, against under 5% in July to May, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Arched Marble sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
9th of 9
Of the 9 cities where we can rate Arched Marble sightings, Helsinki ranks 9th at under 5%. The best odds are in Novosibirsk (Russia, about 10%), Berlin (Germany, about 10%) and Warsaw (Poland, about 10%).
Same family: Tortricidae
The closest relatives of the Arched Marble that you can see in Helsinki (family Tortricidae, Tortricid Leafroller Moths) are Barred Marble (about 10%), Common Marble (about 10%) and White-Foot Bell (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Arched Marble is recorded against all the insects logged in Helsinki (8 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.
