Lasiommata megera
In 3 days ~50% in a week ~80%
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 |
Possible
About 20% of wildlife watchers report a Wall Brown sighting in Milan on a given day, based on 140 verified sightings from GBIF citizen-science data. It is the 21st most-seen of the 351 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
April, June and September–October
In those months about 30% of wildlife watchers report a Wall Brown in Milan on a given day, against under 5% in December and January, 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.
Among the best
Of the 18 cities where we can rate Wall Brown sightings, Milan ranks 2nd at about 20%, level with the leaders once rounded. The best odds are in Barcelona (Spain, about 20%).
GBIF citizen-science records
It is estimated from how often the Wall Brown is recorded against all the insects logged in Milan (140 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.
