Marbled white
Melanargia galathea
Butterfly
The marbled white (Melanargia galathea) is a medium-sized butterfly in the family Nymphalidae, subfamily Satyrinae - one of the 'browns' despite its striking black-and-white chequered wing pattern. Adults fly from late June to early September across flower-rich grasslands, chalk downland, and meadows throughout most of Europe, North Africa, and western Asia. Both sexes feed extensively on nectar, showing a marked preference for purple-flowered plants such as knapweeds, thistles, and scabious. Larvae feed nocturnally on fine grasses, especially fescues (Festuca spp.) and cocksfoot (Dactylis glomerata), making unimproved grassland with a mix of wildflowers and coarse grasses the ideal garden or meadow habitat.
Plan for this species
Location-fit plant set for Chicago, IL: host and specialist plants first, then nectar, fruit, seed, foliage, and shelter plants that still fit the current and mid-century climate read.
2 essential relationships / 2 supporting plants
Host/specialist links: 2
Forage/pollination links: 2
Shelter links: 0
Relationship roles: 2
Red fescue
Essential / Larval host plants
Melanargia galathea larvae feed nocturnally on fine grasses, and this catalog record for the marbled white names fescues (Festuca spp.) as the principal host alongside cocksfoot. Marked plausible rather than documented because that host statement is at GENUS level: none of the sources cited on this plant record names Festuca rubra specifically. The guidance is unaffected either way, and it is the reason to leave part of a fescue sward unmown - a lawn cut every week is a host plant that never carries an egg through to pupation.
Sheep fescue
Essential / Larval host plants
Marked plausible rather than documented, and the distinction is real. Wikipedia's list of caterpillars on Festuca ovina does not include the marbled white; what supports the entry is this catalogue's own marbled white record, which gives fescues (Festuca spp.) as the principal larval foodplants, together with the fact that the butterfly is a specialist of unimproved flower-rich grassland where sheep fescue is a defining component. Red fescue is the fescue most often named for this butterfly, so read the entry as genus-level rather than species-level evidence. Three further species named on Wikipedia have no entry in this wildlife catalogue and are recorded here in prose instead of being wired: the small heath (Coenonympha pamphilus), the grayling (Hipparchia semele) and the grass moth Agriphila inquinatella.
Field scabious
Supporting / Nectar plants
Field scabious is a documented favourite adult nectar source for the marbled white in unimproved grassland.
Cornflower
Supporting / Nectar plants
The butterfly has a strong genus-level preference for Centaurea (knapweeds); cornflower is a plausible same-genus nectar source.
Plants in the catalog
Larval host plants · 2
Melanargia galathea larvae feed nocturnally on fine grasses, and this catalog record for the marbled white names fescues (Festuca spp.) as the principal host alongside cocksfoot. Marked plausible rather than documented because that host statement is at GENUS level: none of the sources cited on this plant record names Festuca rubra specifically. The guidance is unaffected either way, and it is the reason to leave part of a fescue sward unmown - a lawn cut every week is a host plant that never carries an egg through to pupation.
Marked plausible rather than documented, and the distinction is real. Wikipedia's list of caterpillars on Festuca ovina does not include the marbled white; what supports the entry is this catalogue's own marbled white record, which gives fescues (Festuca spp.) as the principal larval foodplants, together with the fact that the butterfly is a specialist of unimproved flower-rich grassland where sheep fescue is a defining component. Red fescue is the fescue most often named for this butterfly, so read the entry as genus-level rather than species-level evidence. Three further species named on Wikipedia have no entry in this wildlife catalogue and are recorded here in prose instead of being wired: the small heath (Coenonympha pamphilus), the grayling (Hipparchia semele) and the grass moth Agriphila inquinatella.
Nectar plants · 2
The butterfly has a strong genus-level preference for Centaurea (knapweeds); cornflower is a plausible same-genus nectar source.
Field scabious is a documented favourite adult nectar source for the marbled white in unimproved grassland.
Range
Found across most of Europe except Ireland, northern Britain, Scandinavia (apart from Denmark), Portugal, and most of Spain (where it is replaced by the closely related Melanargia lachesis); extends through Turkey, the Caucasus, and Iran. In Britain it is largely confined to southern and south-western England and south Wales but has been expanding northward and eastward in recent decades, likely linked to climate warming. Populations in the Maghreb region of North Africa are currently treated by most authorities as a separate species, Melanargia lucasi, though some sources retain them as a subspecies of M. galathea.
Sources & citations
Cite this page
Use this citation for the Plotwright wildlife record. Use the source cards below to explore the references that informed its taxonomy, range, conservation, host plants, foraging, and habitat.
Plotwright. (n.d.). Marbled white (Melanargia galathea). Retrieved 2026, August 20, from https://plotwright.com/wildlife/marbled-white
Sources used for this record
This record is compiled from the sources below.
Marbled white - Wikipedia
Identification as a chequered satyrine, the European-to-west-Asian range with the contested North African M. lucasi, the grass larval hosts, and the adult preference for purple knapweed and scabious nectar.
Marbled white - UK Butterflies
UK Butterflies species account for the marbled white, covering its southern-British colonies, single-brood summer flight, grass larval foodplants, and adult nectaring on knapweeds, thistles, and marjoram.
Melanargia galathea - GBIF
GBIF backbone taxonomy record for Melanargia galathea, confirming the accepted species and its European-to-west-Asian occurrence range.
Melanargia galathea - iNaturalist
iNaturalist taxon page for Melanargia galathea, corroborating the accepted name and observation-based distribution.