Cepphis advenaria
In 3 days ~20% in a week ~40%
Cepphis advenaria, the little thorn, is a moth of the family Geometridae. The species can be found in Europe and across the Palearctic to Japan. The wingspan is 23–26 mm. The length of the forewings is 14–17 mm. The ground colour is usually whitish, or whitish ochreous freckled and clouded with grey brown or much mixed with deep ochreous. The cross lines are slightly darker. The 1st line of the forewing is sometimes nearly straight, the 2nd line has an angle in the middle, posteriorly curved, commonly oblique out wards at hindmargin The markings may be tinged with ochreous, or with red. On the rear wing is a dark dot. ab. fulva Gillmer is so uniformly irrorated as to appear dark yellow-brown throughout, unmarked except by the discal dots. The larva is variable, purplish grey or olive brown, abdomen with pale grey dorsal lozenges and 2 pale yellow oblique spots or dashes on the 2nd abdominal. The venter is more reddish, with dark V-shaped markings. The pupa is stout and rugose, not glossy; dorsum and abdomen light brown, the wings, legs greenish. See also the genus description (references - Watson, L., and Dallwitz, M.J. 2003) and Prout
The moths fly... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Moscow | 🇷🇺 Russia |
With luck
About 10% of wildlife watchers report a Little Thorn sighting in Bavarian Forest National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 523rd most-seen of the 1115 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.
May and June
In those months about 10% of wildlife watchers report a Little Thorn in Bavarian Forest National Park on a given day, against under 5% in July to April, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Little Thorn sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Bavarian Forest National Park, in our data
Bavarian Forest National Park is the only park on Wallace's Line with enough records to rate Little Thorn sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Geometridae
The closest relatives of the Little Thorn that you can see in Bavarian Forest National Park (family Geometridae, Geometer Moths) are Common Heath (about 20%), Latticed Heath (about 20%) and Yellow Shell Moth (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Little Thorn is recorded against all the insects logged in Bavarian Forest National Park (10 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.
