Lasiommata megera
In 3 days ~20% in a week ~40%
Lasiommata megera, the wall or wall brown, is a butterfly in the family Nymphalidae (subfamily Satyrinae). It is widespread in the Palearctic realm with a large variety of habitats and number of generations a year. P. megera L. [— xiphie Boisd. pt (45d). Above reddish yellow, with a black mark which traverses the distal band from the cell of the forewing to the abdominal margin of the hindwing, short black stripes crossing the disc and the cell of the forewing.
The species lives in North Africa, Europe, the Caucasus, Asia Minor, the Middle East, western Siberia, northern Tian Shan, Dzungarian Alatau, Kazakhstan and Dzungaria. Habitats include forest edges and clearings, shrubby areas in ravines and river valleys and sparse woodlands. It is also found in mountain habitats up to 0–3,000 metres (0–9,843 ft) above sea level.
The imago flies from April to October in two or three generations depending on locality and altitude. The larva feeds on grasses in the genera Festuca, Bromus, Deschampsia, Poa, Dactylis and Brachypodium. "The egg is pale green when first laid, and in shape it is almost spherical, but rather higher than... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 2 | Picos de Europa National Park | 🇪🇸 Spain | |
| 3 | Aigüestortes National Park | 🇪🇸 Spain | |
| 4 | Cévennes National Park | 🇫🇷 France | |
| 5 | Kiskunság National Park | 🇭🇺 Hungary | |
| 6 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 7 | Mercantour National Park | 🇫🇷 France | |
| 8 | Monfragüe National Park | 🇪🇸 Spain | |
| 9 | Ordesa y Monte Perdido National Park | 🇪🇸 Spain | |
| 10 | Pyrénées National Park | 🇫🇷 France | |
| 11 | Camargue | 🇫🇷 France | |
| 12 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 13 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 14 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 15 | Vanoise National Park | 🇫🇷 France | |
| 16 | Triglav National Park | 🇸🇮 Slovenia | |
| 17 | Wadden Sea National Park | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Wall Brown sighting in Wadden Sea National Park on a given day, based on 47 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 171st most-seen of the 818 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 to October
In those months about 10% of wildlife watchers report a Wall Brown in Wadden Sea National Park on a given day, against under 5% in November to April, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Wall Brown sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
17th of 17
Of the 17 parks where we can rate Wall Brown sightings, Wadden Sea National Park ranks 17th at about 10%. The best odds are in Sierra Nevada National Park (Spain, about 40%), Picos de Europa National Park (Spain, about 30%) and Aigüestortes National Park (Spain, about 30%).
GBIF citizen-science records
It is estimated from how often the Wall Brown is recorded against all the insects logged in Wadden Sea National Park (47 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.
