{{Short description|Species of butterfly}} {{Italic title}} {{Speciesbox | name = Wall brown | image = Wall (Lasiommata megera) male Italy.jpg | image_caption = Male<br/>Sorrento Peninsula, Italy | image2 = Lasiommata megera male underside 2.jpg | image2_caption = Male<br/>Pewsey Downs, Wiltshire, UK | status = LC | status_system = IUCN3.1 | status_ref = <ref>{{cite iucn |author=van Swaay, C. |author2=Ellis, S. |author3=Warren, M. |year=2025 |title=''Lasiommata megera'' (Europe assessment) |volume=2025 |article-number=e.T174245A211398778 |doi=10.2305/IUCN.UK.2025-1.RLTS.T174245A211398778.en |access-date=26 June 2025}}</ref> | taxon = Lasiommata megera | authority = (Linnaeus, 1767) | synonyms = {{Specieslist | Papilio megera | Linnaeus, 1767 | Dira megera | (Linnaeus, 1767) | Pararge megaera | (Linnaeus, 1767) | Satyrus megaera | (Linnaeus, 1767) | Satyrus maegera | (Linnaeus, 1767) }} | synonyms_ref = <ref name=GBIF>{{cite web |url=https://www.gbif.org/species/4535632 |title=''Lasiommata megera'' (Linnaeus, 1767) |access-date=11 October 2025 |website=GBIF.org}}</ref> }} [[File:Lasiommata megera LC0311.jpg|thumb|Female<br/>Chemnitz, Germany]] [[File:Wall (Lasiommata megera) female underside.jpg|thumb|Female<br/>Scratchbury and Cotley Hills SSSI, Wiltshire]]
'''''Lasiommata megera''''', the '''wall'''<ref>[http://www.ukbutterflies.co.uk/species.php?species=megera Wall] at UK Butterflies</ref> 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.
==Description== ''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.<ref>Seitz. A. in Seitz, A. ed. Band 1: Abt. 1, ''Die Großschmetterlinge des palaearktischen Faunengebietes, Die palaearktischen Tagfalter'', 1909, 379 Seiten, mit 89 kolorierten Tafeln (3470 Figuren){{PD-notice}}</ref>
==Range== 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== 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 {{convert|0|-|3000|m}} above sea level.
thumb|Egg, larva and pupa
==Life history== 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 broad; it is finely ribbed and reticulated, but unless examined through a lens it appears to be quite smooth. The caterpillar when full grown is whitish-green, dotted with white. From the larger of these dots on the back arise greyish bristles; the three lines on the back (dorsal and sub-dorsal) are whitish, edged with dark green; the line on the sides (spiracular) is white, fringed with greyish hairs; anal points green, hairy, extreme tips white. Head larger than the first ring (first thoracic segment), green dotted with white and hairy, jaws marked with brownish. The chrysalis is green, with yellow-tinted white markings on the edge of the wing covers and ridges; the spots on the body are yellowish, or sometimes white. Occasionally the chrysalids are blackish, with white or yellow points on the body". (South 1906)
==Subspecies== *''L. m. megera'' *''L. m. vividissima'' *''L. m. megerina'' <small>(Herrich-Schäffer, 1856)</small> – Transcaucasia *''L. m. transcaspica'' <small>(Staudinger, 1901)</small> – Turkmenia <gallery mode=packed heights="140px"> (MHNT) Lasiommata megera - Foret de Bouconne, France - male dorsal.jpg| ''Lasiommata megera megera'' ♂ (MHNT) Lasiommata megera - Foret de Bouconne, France - male ventral.jpg| ♂ △ (MHNT) Lasiommata megera - Foret de Bouconne, France - female dorsal.jpg| ♀ (MHNT) Lasiommata megera - Foret de Bouconne, France - female ventral.jpg| ♀ △ </gallery>
==Size== Size: {{convert|36|-|50|mm}}
==References== {{Reflist}} *[http://ftp.funet.fi/pub/sci/bio/life/insecta/lepidoptera/ditrysia/papilionoidea/nymphalidae/satyrinae/lasiommata/ "''Lasiommata'' Westwood, 1841"] at Markku Savela's ''Lepidoptera and Some Other Life Forms'' *[http://www.butterfly-guide.co.uk/species/satyrids/ukm11.htm butterfly-guide.co.uk] {{Webarchive|url=https://web.archive.org/web/20190722083301/http://www.butterfly-guide.co.uk/species/satyrids/ukm11.htm |date=2019-07-22 }}
==External links== {{commons category|position=left}} *[http://www.leps.it/ Moths and Butterflies of Europe and North Africa] {{Taxonbar|from=Q1434652}}
megera Category:Butterflies of Africa Category:Butterflies of Asia Category:Butterflies of Europe Category:Butterflies described in 1767 Category:Animal taxa named by Carl Linnaeus {{Elymniini-stub}}