Main: (Crambidae / Pyraustinae)
63.026 [B&F: 1374a] Sclerocona acutellus (Eversmann, 1842)


Suspected rare immigrant, or perhaps accidentally imported, from central Europe. The first three national records, at Leckford, Hampshire on 8 August 1988, Virginia Water, Surrey on 13 June 1989 and Henley-on-Thames, Oxfordshire on 20 June 1995 were thought to refer to genuine migrants. Subsequent records, including three between 13 June and 5 July 1999 in a garden in Exeter in close proximity to a newly-thatched cottage, and probably all preceding records, are believed to have originated from reeds imported from central Europe for thatching cottages. However, in 2010 a thriving colony was discovered at Afton Marshes, IoW and has been recorded annually ever since; the origin of this population is unknown, nor indeed how long it may have been at this site - primary immigration would seem to be more than plausible. Wingspan 25-30 mm. Larva feeds on Common Reed.

Flightime guide

Records Received By Year

% of total records
Max records: 3
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19

Percentage of Total Records

Total records
Max Percentage: 0.0014332054
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19

Phenology - Adult Records

Max records: 5
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
Afton Marsh (SZ38)21-Jun-2010fiveHalsey, JAdult
Afton Marsh (SZ38)19-Jul-2010sixHalsey, JAdult
Afton Marsh NR (SZ38)26-Jun-201112Halsey, JAdult
Afton Marsh NR (SZ38)27-Jun-2012fiveHalsey, JAdult
Afton Marsh (SZ38)26-Jun-2014fourClarke, JHAdult
Afton Marsh (SZ38)29-Jun-2014oneClarke, JHAdult
Afton Marsh (SZ38)03-Jul-2014oneElliott, BAdult
Afton Marsh (SZ38)25-Jun-2015oneClarke, JHAdult
VC12 North Hampshire
Leckford (SU33)08-Aug-1988oneSterling, DHAdult
Cholderton Lodge (SU24)12-Jul-2013oneNorriss, TJ; Fomison, L; Edmunds, HAdult

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