Olethreutes arcuella
In 3 days ~20% in a week ~30%
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 |
With luck
About 10% of wildlife watchers report an Arched Marble sighting in Warsaw on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 268th most-seen of the 580 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.
May and June
In those months about 10% of wildlife watchers report an Arched Marble in Warsaw on a given day, against under 5% in July to April, 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.
Among the best
Of the 9 cities where we can rate Arched Marble sightings, Warsaw ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Novosibirsk (Russia, about 10%) and Berlin (Germany, about 10%).
GBIF citizen-science records
It is estimated from how often the Arched Marble is recorded against all the insects logged in Warsaw (13 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.
