Venusia blomeri
In 3 days ~10% in a week ~30%
Blomer's rivulet (Venusia blomeri) is a species of the family Geometridae of moths, in the subfamily Larentiinae which includes the carpet moth and pugs. Like most geometers the moth rests with its wings open and this reveals its main distinguishing feature — a rusty-brown patch covering the apex of the upper surface of the forewing, which contrasts with the pale grey colour of the rest of the wings. When seen up close there are faint blackish cross lines too. The egg is yellow, small, angular, flat and has diamond-shaped depressions. The caterpillar is yellowish or light green coloured. The head, a thoracic segment and the penultimate segment are strikingly reddish-brown. The pupa
has curved hooks on the cremaster. The species has a large world range, occurring from France, Britain and Scandinavia through eastern Europe and Russia to China and Japan. Blomer's rivulet is the only member of its genus found in Britain.
It is regarded by biodiversity conservation organisations as important from a conservation perspective, both in its own right due to its nationally scarce status but also as a representative of a group of moths which are specialised feeders on elm... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Blomer's Rivulet sighting in Bavarian Forest National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 727th most-seen of the 1115 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
May–June and August
In those months about 10% of wildlife watchers report a Blomer's Rivulet in Bavarian Forest National Park on a given day, against under 5% in July and September–April, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Blomer's Rivulet 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 Blomer's Rivulet sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Geometridae
The closest relatives of the Blomer's Rivulet 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 Blomer's Rivulet is recorded against all the insects logged in Bavarian Forest National Park (7 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.
