The Moths of Suffolk
1914 Dusky Thorn, Ennomos fuscantaria, (Haworth, 1809)

National Status : Common

Local Status : Resident (SMP Status 2)

Distribution and abundance : Widespread and infrequent

Habitats : Woodland, hedgerows and gardens

Flight Period : Single-brooded; August to early October

Larval foodplants : Ash

Morley's Final Catalogue : Though formerly dubbed 'rare,' and known from a handful of localities, this species suddenly expanded over the entire County in 1895 amazingly. Probably now no remotest hamlet is without it, in the latter half of August. Even Monks Soham then sports it occasionally, at light; and it ranges to the border at Gorleston. For a larva in. 1857, cf. Ent. Wk. Intell. iii, 4.

Wingspan details : Forewing 17-21mm, Wingspan 38-42mm

Identification

Confusion species
    AdultLarge Thorn, Ennomos autumnaria
August Thorn, Ennomos quercinaria
Canary-shouldered Thorn, Ennomos alniaria
September Thorn, Ennomos erosaria

Compare confusion species
    Adult

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Rendham (ix.2002) © M Deans

Flight chart
JFMAMJJASOND
1 100 88 3

Life history chart
JFMAMJJASOND
ova ova ova ova larva larvapupa larvapupaimago imago imago ovaimago ova ova

Further Photographs

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Woolpit, Suffolk (viii.2006) © Paul Bryant
Great Cornard, Suffolk (14.ix.2006) © Stuart Read
Thompson common, Norfolk (24.viii.2012) © Neil Sherman
 
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Spexhall, Suffolk (5.viii.2009) © A Prichard
First site record - Bawdsey, Suffolk (17.ix.2009) © Matthew Deans
First site record - Ipswich, Suffolk (4.ix.2014) © Neil Sherman
 
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One of 7 trapped in 2015 following first record in 2014 - Ipswich, Suffolk (12.ix.2015) © Neil Sherman
Female - Madjarovo, Bulgaria (18.vi.2015) © Neil Sherman
Ipswich, Suffolk (7.viii.2017) © Paul Kitchener