Crambidae : Crambinae
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Photo © Ben Sale,  Sawbridgeworth Marsh, Hertfordshire (04/07/12) - f.nivella

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Calamotropha paludella

(Hübner, 1824)1292 / 63.079

General comments:
Widespread but local resident.

Formerly restricted to large fens and marshes in the East Anglian fenland district and in central southern England, individual adults occasionally wandered to other areas and were recorded as 'vagrants'. This was undoubtedly the source of the first Hertfordshire example at Bushey on 16th July 1969 (Barry Goater). During the 1980s, the number of such vagrants increased and it became clear that the species was becoming resident in other parts of the country. After the Bushey example, there were none reported in Hertfordshire until Sawbridgeworth Marsh on 27th July 1990. Whether or not it was resident on the marsh at that date is unclear, but it was certainly established by 1995. Occasional wanderers appeared in various new localities, including garden light traps, for the next few years and by 2000 it was clearly resident across most of southern and eastern Hertfordshire and also making inroads to Middlesex. By about 2010 it was widesly established across both counties.

Recorded in 30 (73%) of 41 10k Squares.
First Recorded in 1948.
Last Recorded in 2023.
Additional Stats

Chilo phragmitella | Chrysoteuchia culmella >

List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
19/08/2023220TL31 - Hertford
18/08/2023120TQ09 - Watford / Rickmansworth
10/08/2023121TQ16 - Sunbury / Hampton Court
29/07/2023120TL22 - Stevenage
29/07/2023120TQ09 - Watford / Rickmansworth
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
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VC20 VC21 VC21 VC20
Click Map for Details
Wingspan: 22-33 mm.
Flight: July and August
Foodplant:   Reedmace, Bulrush.
Nat Status: Local
Verification Grade:  Adult: 1
 Immature Adult   [Show Flight Weeks]
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