Acrobasis marmorea
In 3 days ~10% in a week ~20%
Acrobasis marmorea is a moth of the family Pyralidae. It is found in Europe. The wingspan is 18–23 mm. The moth flies in one generation from June to August. [1]. The caterpillars feed on hawthorn and blackthorn. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Marbled Knot-Horn sighting in Sierra de Guadarrama National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 528th most-seen of the 597 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 a Marbled Knot-Horn in Sierra de Guadarrama National Park on a given day, against under 5% in July to May, the lowest months.
Between 11 pm and 2 am
Across all the parks we cover, that three-hour window holds the most Marbled Knot-Horn sightings with a recorded time, and nearly all of them come between 6 pm and 6 am: it is mostly seen at night.
Only Sierra de Guadarrama National Park, in our data
Sierra de Guadarrama National Park is the only park on Wallace's Line with enough records to rate Marbled Knot-Horn sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Marbled Knot-Horn is recorded against all the insects logged in Sierra de Guadarrama National Park (5 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.
