Gluphisia crenata
In 3 days ~10% in a week ~20%
Gluphisia crenata, the dusky marbled brown, is a moth of the family Notodontidae. The species was first described by Eugenius Johann Christoph Esper in 1785. It is found in Europe, east over parts of Russia and China up to Japan. It is also found in North America, where it was traditionally treated as a separate species, Gluphisia septentrionis.
The wingspan is 28–34 mm. The moth flies from April to August in two generations depending on the location. The larvae feed on Populus species, such as P. nigra, P. balsamifera and P. tremula, but also on Salix purpurea.
Gluphisia crenata exhibit a puddling behavior, sucking up fluid from puddles, pumping it through the digestive tract, and excreting it at 3 second intervals. Gluphisia crenata crenata Gluphisia crenosa crenosa (Hubner, 1796)
Retrieved July 31, 2019. Taxonomy Fauna Europaea Lepiforum... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Pyrénées National Park | 🇫🇷 France | |
| 2 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Paris | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report a Dusky Marbled Brown sighting in Paris on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 827th most-seen of the 916 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Dusky Marbled Brown in Paris on a given day, so our monthly data shows no clear season.
Between 11 pm and 2 am
Across all the parks we cover, that three-hour window holds the most Dusky Marbled Brown sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Paris, in our data
Paris is the only city on Wallace's Line with enough records to rate Dusky Marbled Brown sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Dusky Marbled Brown is recorded against all the insects logged in Paris (10 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.
