Cepphis advenaria
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Little Thorn sighting in Moscow on a given day, based on 25 verified sightings from GBIF citizen-science data. It is the 366th most-seen of the 1111 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 Little Thorn in Moscow on a given day, against under 5% in July to May, 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 Moscow, in our data
Moscow is the only city on Wallace's Line with enough records to rate Little Thorn sightings: under 5% 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 Moscow (family Geometridae, Geometer Moths) are Winter Moth (about 10%), Common Carpet Moth (about 10%) and Northern Winter Moth (about 10%), 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 Moscow (25 verified sightings), 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.
