Acrobasis advenella
In 3 days ~20% in a week ~40%
Acrobasis advenella is a species of snout moth in the genus Acrobasis. It was described by Johann Zincken in 1818 and is found in most of Europe. They have an oligophagous diet primarily feeding on plants from the Rosaceae family including the black chokeberry (Aronia melanocarpa). They cause significant damage to organic chokeberry farming, due to their widespread impact on the quality and quantity of the black chokeberry plants.
The wingspan is 17–24 mm.Similar to Acrobasis suavella. but the an area on the dorsal half of the forewing enclosed by the sub-basal line and pre median line is more sharply defined in A. advenella The red scales, mixed with black and white, enclosed by this area cover the basal area, thorax and head of A. advenella to a lesser extent than in A. suavella which has a grey head.The discal spots differ in position. Meyrick describes it - Head and front of thorax ferruginous-reddish. Forewings brownish-ochreous, none or less mixed or suffused with reddish and dark fuscous; lines slender, obscurely whitish, first bent, preceded by a straight whitish line joining it near costa, space between them reddish suffused anteriorly with dark fuscous, second darker-edged; a broad fascia of grey-whitish irroration from costa before second
line to lower extremity of first, including two obliquely placed darker discal dots; some whitish irroration towards termen. Hindwings fuscous.Larva light green; subdorsal line purplish-pink; head pale brown: in a silken gallery amongst flowers and leaves of hawthorn and Pyrus; 5, 6.
The moth flies in one generation from July to August [1].. The larvae feed on Crataegus, Pyrus and Sorbus aucuparia. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Wadden Sea National Park | 🇩🇪 Germany | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | London | 🇬🇧 United Kingdom | |
| 3 | Birmingham | 🇬🇧 United Kingdom | |
| 4 | Helsinki | 🇫🇮 Finland | |
| 5 | Copenhagen | 🇩🇰 Denmark | |
| 6 | Paris | 🇫🇷 France | |
| 7 | Moscow | 🇷🇺 Russia |
With luck
About 10% of wildlife watchers report a Grey Knot-Horn sighting in Wadden Sea National Park on a given day, based on 41 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 164th most-seen of the 818 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Grey Knot-Horn in Wadden Sea National Park on a given day, against under 5% in September to June, the lowest months.
Between 11 pm and 2 am
Across all the parks we cover, that three-hour window holds the most Grey Knot-Horn sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Yes
Of the 2 parks where we can rate Grey Knot-Horn sightings, Wadden Sea National Park has the highest daily chance: about 10%. Next come Bavarian Forest National Park (Germany, about 10%).
Same family: Pyralidae
The closest relatives of the Grey Knot-Horn that you can see in Wadden Sea National Park (family Pyralidae, Pyralid Snout Moths) are Long-Legged Tabby (about 10%), Rosy Tabby (about 10%) and Rosy-Striped Knot-Horn (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Grey Knot-Horn is recorded against all the insects logged in Wadden Sea National Park (41 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.
