Dicallomera fascelina
In 3 days ~20% in a week ~40%
Dicallomera fascelina, the dark tussock, is a moth in the family Erebidae. The species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae. It is found in most of Europe, through the Palearctic to Central Asia to Korea.
The wingspan is 35–45 mm. "Forewing ash-grey, lighter at the costal margin, with black and yellow irrorations, the median area bounded on the inner side by a regularly curved dark transverse line and on the outer side by a similar one twice or three times broken; both lines being most distinct at the costal margin. Hindwing grey or whitish. ab. proletaria Strand does not attain more than 29 mm. in the male; it is also distinguished by the ground colour of both wings being olive-grey, with the two transverse lines rather indistinct and not reaching the hindmargin, while the discocellular spot is more conspicuous than in true fascelina. - medicagitlis Hbn. is darker in the female. Forewing black-grey, the light costal area only indicated at the most, but the sharply defined discocellular spot situated in a white patch from whichextend long acute prolongations directed marginad; the outer transverse... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 2 | Ecrins National Park | 🇫🇷 France | |
| 3 | Wadden Sea National Park | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Dark Tussock sighting in Ecrins National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 187th most-seen of the 251 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.
June
In that month about 20% of wildlife watchers report a Dark Tussock in Ecrins National Park on a given day, against under 5% in September to May, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Dark Tussock 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 3 parks where we can rate Dark Tussock sightings, Ecrins National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Cairngorms National Park (United Kingdom, about 10%).
Same family: Erebidae
The closest relatives of the Dark Tussock that you can see in Ecrins National Park (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Jersey Tiger (about 20%), Scarlet Tiger (about 10%) and Garden Tiger (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Dark Tussock is recorded against all the insects logged in Ecrins 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.
