Camptogramma bilineata
In 3 days ~40% in a week ~70%
Camptogramma bilineata, the yellow shell, is a colourful moth of the family Geometridae. The species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae. It can be found in Europe and east across the Palearctic to the Altai Mountains. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 2 | Biebrza National Park | 🇵🇱 Poland | |
| 3 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 4 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 5 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 6 | Wadden Sea National Park | 🇩🇪 Germany | |
| 7 | Aigüestortes National Park | 🇪🇸 Spain | |
| 8 | Picos de Europa National Park | 🇪🇸 Spain | |
| 9 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 10 | Cévennes National Park | 🇫🇷 France | |
| 11 | Triglav National Park | 🇸🇮 Slovenia | |
| 12 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 13 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | Kharkiv | 🇺🇦 Ukraine | |
| 3 | Birmingham | 🇬🇧 United Kingdom | |
| 4 | London | 🇬🇧 United Kingdom | |
| 5 | Budapest | 🇭🇺 Hungary | |
| 6 | Kyiv | 🇺🇦 Ukraine | |
| 7 | Berlin | 🇩🇪 Germany | |
| 8 | Prague | 🇨🇿 Czechia | |
| 9 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 10 | Vienna | 🇦🇹 Austria |
With luck
About 10% of wildlife watchers report a Yellow Shell Moth sighting in Sierra de Guadarrama National Park on a given day, based on 93 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 41st most-seen of the 597 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
June
In that month about 30% of wildlife watchers report a Yellow Shell Moth in Sierra de Guadarrama National Park on a given day, against under 5% in October to April, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Yellow Shell Moth sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
4th of 13
Of the 13 parks where we can rate Yellow Shell Moth sightings, Sierra de Guadarrama National Park ranks 4th at about 10%. The best odds are in Sierra Nevada National Park (Spain, about 20%), Biebrza National Park (Poland, about 20%) and Bavarian Forest National Park (Germany, about 20%).
Same family: Geometridae
The closest relatives of the Yellow Shell Moth that you can see in Sierra de Guadarrama National Park (family Geometridae, Geometer Moths) are Heliothea discoidaria (about 10%), Chimney-Sweeper (about 10%) and Lythria cruentaria (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow Shell Moth is recorded against all the insects logged in Sierra de Guadarrama National Park (93 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.
