Photo © Keith Tailby

Sclerocona acutellus

Checklist Number
63.026 [B&F: 1374a]

Verification
Record will normally be accepted but photo evidence may be required - check with CMR if not sure of identity

Classification

Family:Crambidae
Subfamily:Pyraustinae
Genus:Sclerocona
Species:acutellus
Authority:(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.

The abundance in each month is indicated as follows:

No records
Very occasional
Irregular
Uncommon
Off-peak, but not unusual
Off-peak, but not unusual
Main flight time
J F M A M J J A S O N D
Adult
Larval

Records by week (adult)

Records by week (larval)

No Larval records to show.

VC10 Isle of Wight

Site Date Quantity Recorder Stage
Afton Marsh (SZ38)21/06/2010fiveJames HalseyAdult
Afton Marsh (SZ38)19/07/2010sixJames HalseyAdult
Afton Marsh NR (SZ38)26/06/201112James HalseyAdult
Afton Marsh NR (SZ38)27/06/2012fiveJames HalseyAdult
Afton Marsh (SZ38)26/06/2014fourJulian ClarkeAdult
Afton Marsh (SZ38)29/06/2014oneJulian ClarkeAdult
Afton Marsh (SZ38)03/07/2014oneBrian ElliottAdult
Afton Marsh (SZ38)25/06/2015oneJulian ClarkeAdult

VC12 North Hampshire

Site Date Quantity Recorder Stage
Leckford (SU33)08/08/1988oneD H SterlingAdult
Cholderton (SU24)20/07/2013oneTim Norriss, Lynn Fomison, Henry EdmundsAdult