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{{short description|Species of moth}}
{{Use dmy dates|date=December 2023}}
{{Speciesbox
| image = Noctua.janthina.7349.jpg
| image_caption =
| taxon = Noctua janthina
| authority = [[Michael Denis|Denis]] & [[Ignaz Schiffermüller|Schiffermüller]], 1775
}}

The '''lesser broad-bordered yellow underwing''' or '''Langmaid's yellow underwing''' (''Noctua janthina'') is a [[moth]] of the family [[Noctuidae]]. It is distributed throughout southern and central Europe, and southern Sweden.

[[File:Noctua jantina MHNT.jpg|thumb|upright 1.3|'' Noctua janthina ''|left]]
Like other members of its genus this species has bright orange-yellow hindwings but as the common name suggests the black sub-terminal bands are very broad and account for about half the area of the hindwings. The forewings are more cryptically marked but are generally more attractively marked than in its congenators, variegated in shades of buff and purplish-brown. The [[wingspan]] is 34–44 mm. This species can only be separated from ''[[Noctua janthe]]'' and the disputed ''[[Noctua tertia]]'' by examination of the genitalia. See Townsend et al.<ref>Martin C. Townsend, Jon Clifton and Brian Goodey (2010). [https://butterfly-conservation.org/uploads/Difficult_species_guide_page_50.pdf ''British and Irish Moths: An Illustrated Guide to Selected Difficult Species'']. (covering the use of genitalia characters and other features) Butterfly Conservation.</ref>
[[Image:Buckler W The larvæ of the British butterflies and moths PlateLXXIV.jpg|thumb|140px|left|1,1a,1b,1c larva after last moult]]
The adults fly at night from the latter half of July to August<ref>[http://www.nic.funet.fi/pub/sci/bio/life/insecta/lepidoptera/ditrysia/noctuoidea/noctuidae/noctuinae/noctua/index.html#janthina Information on Noctua janthina]</ref> and are attracted to light and sugar.

The [[larva]] is brown with v-shaped markings along the back. It feeds on a wide variety of plants (see list below). The species overwinters as a larva.

==Recorded food plants==
*''Arum'' – [[Arum maculatum|Cuckoo pint]]
*''[[Crataegus]]'' – [[Crataegus|Hawthorn]]
*''Hedera'' – [[Ivy]]
*''[[Primula]]''
*''Prunus'' – [[Blackthorn]]
*''[[Rubus]]''
*''[[Rumex]]''
*''Salix'' – [[Willow]]
*''Ulmus'' – [[Elm]]
*''[[Urtica]]'' – Nettle
*''[[Viola (plant)|Viola]]''

==References==
{{Reflist}}

==Further reading==
*Chinery, Michael ''Collins Guide to the Insects of Britain and Western Europe'' 1986 (Reprinted 1991)
*Skinner, Bernard ''Colour Identification Guide to Moths of the British Isles'' 1984

{{Taxonbar|from=Q1356694}}

[[Category:Noctua (moth)]]
[[Category:Moths described in 1775]]
[[Category:Moths of Europe]]
[[Category:Moths of the Middle East]]

Lesser broad-bordered yellow underwing - Revision history

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