Catoptria verellus
In 3 days ~10% in a week ~20%
Catoptria verellus is a species of moth of the family Crambidae. It is found in Europe. The wingspan is 17–18 mm. The forewings are brown, suffusedly mixed with blackish except on veins and towards costa; anterior half of costa white; an undefined white median streak from base, becoming soon obsolete; second line white, strongly curved and interrupted above middle, indented near dorsum, indentation preceded by an oblique white wedge; cilia rather metallic grey, with three or four slender white bars. Hindwings are light grey.
The moth flies from July to August depending on the location. The larvae feed on mosses on old apple (Malus), plum (Prunus) and poplar (Populus) trees. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 2 | Wadden Sea National Park | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Marbled Grass-Veneer sighting in Wadden Sea National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 699th most-seen of the 818 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.
July
In that month about 10% of wildlife watchers report a Marbled Grass-Veneer in Wadden Sea National Park on a given day, against under 5% in August to June, the lowest months.
Between 11 pm and 2 am
Across all the parks we cover, that three-hour window holds the most Marbled Grass-Veneer 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.
2nd of 2
Of the 2 parks where we can rate Marbled Grass-Veneer sightings, Wadden Sea National Park ranks 2nd at under 5%. The best odds are in Bavarian Forest National Park (Germany, about 10%).
GBIF citizen-science records
It is estimated from how often the Marbled Grass-Veneer is recorded against all the insects logged in Wadden Sea National Park (6 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.
