Species Account

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Summary Data

Season (Adult / Immature):

National Status: Local

Local Status: Uncommon and thinly distributed or restricted resident.

Local Record: Grade 2   See here for explanation

Flight time: One generation, Jul-Sep.

Forewing: 14-17mm.

Foodplant: Yellow Iris, Great Fen-sedge.

IMPORTANT - Please note that the maps and accounts are provisional, subject to change and further update.  The whole dataset still needs to go through the final verification process and it is likely that a very small number of records will not satisfy the present requirements and there are other records that have not been formally submitted.  The information is for guidance only.

Record breakdown:

Year first recorded193419911934
Year last recorded201120062011
Number of records10338282
Number of individuals22172586
Unique positions456102
Unique locations41796
Adult records9938274
Immature records000

For the region, we have a total of 282 records from 96 sites. Earliest record on file is in 1934.


2368 Crescent 03
© Julian Francis
2368 Crescent 02 Ab fibrosa
© Paul Harris
2368 Crescent 01
© Jack Oughton

Species Account

For further information refer UK Moths.

Davey, P., 2009: A local marshland species in Britain, the larva feeding on the inner stems of yellow iris (Iris pseudacorus), greater fen-sedge (Cladium mariscus), pond-sedge (Carex spp.) and related plants. In Dorset, the moth is local and at low density, confined mainly to coastal fens at Radipole, Lodmoor, Poole Harbour and Christchurch Harbour, but also colonising fens inland plus several river systems where robust marsh plant species grow in profusion, for example at Maiden Newton. The following light trap records are from non-marshy areas and suggest short to medium-range dispersal on occasion: Iwerne Minster, on 24 July 1955 (H Moore), Woolland, on 8 July 1999 (P Benham), St Albans Head, on 11 August 1986 (P Davey). The following moths were trapped during notable immigrations, and a continental source is suspected in each case: Portland, on 10 August 1995, 4 August 2001, 3 August 2003, 7 August 2003 (M Cade), Durlston, on 15 July 2003 (J McGill).

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