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Noctuidae : Oncocnemidinae

The Anomalous

STILBIA anomala (Haworth, 1812)
Picture
Life Cycle Guide
Picture
Description
Wingspan: 29-36mm
Worldwide Distribution: Western Europe-Great Britain,Norway,Germany,Ireland,France,Spain & Portugal Only
UK Distribution: Local in Hampshire,Dorset,Wiltshire,East Anglia(Breckland) and Midlands : S.W.England,Wales,Isle of Man,northern England and mainland Scotland-Well distributed : Ireland-local (N & W coasts) : Channel Isles-occasional immigrant.
UK Conservation Status -
  • NERC S.41 : 2008 (England) & NERC S.42 : 2009 (Wales) - Species "of principle importance for the purpose of conserving biodiversity
  • Northern Ireland - Priority Species : 2010
  • Local = 101 - 300 10Km Squares
  • BAP : 2007 - Priority Species
  • Endangered
European Conservation Status -
  • Threatened species-Western Europe only
Original Species Name -
  • Phytometra anomala (Haworth, 1812)
Type Species - Stilbia
  • Phytometra anomala (Haworth, 1812)
Type Locality -
  • Great Britain
Flight Period: August to September
Habitat: Lowland heathland : Moorland : Grassy uplands : Coastal grasslands
Similar Species -
  • None
Larva: The larva is subject to various colour forms. 1.Green version-Viewed from side-Larva is green with greenish lateral band through spiracles,above this band is another thinner lateral line in yellow. Viewed from above-3 lateral lines in yellow,one centrally and others on outside of larva. 2.Brown version-Larva dark brown,lateral band through spiracle,light brown.All other information as green version.
Pupa: Pupates underground in a cocoon
Overwinters as: Larva
Observations: The moth is easily identified, being thin and with a silky sheen,very narrow across basal area and with a forewing costa that is straight.The ground colour is slate grey with the stigmata and orbicular spot being white in middle, edged with dark grey, and finally edged white. The orbicular spot appears similar in shape to the stigmata.The subtermial line is whitish and dentate forming facing forward teeth.There is a black patch that joins both the stigmata and the orbicular spot.

The males fly at dusk. The males are attracted to the light trap but the females less so.


Photo Gallery
Larval Food Plants Worldwide
Note - Plants hyperlinked in red below take the visitor to the relevant plant page on"Plants for a Future" website where further information like photos,physical characteristics,habitats,edible uses,medicinal uses,cultivation,propagation,range,height etc. are clearly listed.
  • Plant Families - in bold red below takes the visitor to the relevant "Lepi-plants" page where other butterflies & moths using the plants below are listed.
Taxonomy
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Type Species - STILBIA:

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Type Locality:
Animalia
Eumetozoa
Arthropoda
Hexapoda
Insecta
Lepidoptera
Noctuoidea
Noctuidae
Oncocnemidinae
STILBIA Stephens 1829
Stilbia anomala (Haworth, 1812)
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Phytometra anomala (Haworth, 1812)
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PHYTOMETRA anomala (Haworth, 1812)
= Geometra hybridata Hübner, 1819
= Caradrina stagnicola Treitschke, 1825
= Stilbia insularis Fuchs, 1903.
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The Transactions of the Entomological Society of London by Royal Entomological Society of London : Title Page : p.336 - n.21
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Europe