Main: (Noctuidae / Acronictinae)
73.041 [B&F: 2285] Marsh Dagger (Acronicta strigosa) ([Denis & Schiffermüller], 1775)


Formerly an uncommon resident in the fens of Cambridgeshire and Huntingdonshire, last seen in 1930’s. Since which it has appeared in southern England rarely as an immigrant from the continent, in East Sussex in 1996, and at Pagham Harbour, West Sussex, in July 2010, to which can be added one of the more surprising records of recent years, when an individual turned up in JHa’s Bonchurch (VC10) trap on 2 Aug 2015, and which is therefore a first for the Isle of Wight and for our area. Perhaps even more remarkably, the same recorder pulled in a second, on almost the same date in 2020. Wingspan 30-32 mm. Shows a strong black streak medially from base to claviform stigma, and two others in echelon above tornus (MBGBI Vol 10). Larva feeds on Hawthorn and Blackthorn.

Flightime guide

Records Received By Year

% of total records
Max records: 1
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Percentage of Total Records

Total records
Max Percentage: 8.334445E-4
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Phenology - Adult Records

Max records: 1
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Distribution Map

Historical distribution at tetrad resolution
Click for density map

Record Density

As above but the larger the symbol, the greater the number of records
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Detail records

VC10 Isle of Wight
Bonchurch (SZ57)02-Aug-2015oneHalsey, James Adult
Bonchurch (SZ57)07-Aug-2020oneHalsey, James Adult

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