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Elachista poae
Sweet-grass Dwarf Stainton, 1855
Elachistidae
596 / 38.024
Photo © Chris Lewis,  14/08/2016 - Foulden Common (Gen. Det. Male)

Similar Norfolk Species
Fen Dwarf
Elachista pomerana
Wingspan: 9-12mm
Flight: May - June and Aug
Foodplant:   Reed Sweet-grass.
Nat Status: Nationally Scarce B
Verification Grade:  Adult: 4
Norfolk Status
Scarce.
Characteristic sharply angled median fascia edged with dark ground colour.
Inhabits borders of ponds, lakes and slow moving streams where foodplant Reed Sweet-grass grows in standing water.

Records from the Norfolk Broads and Foulden Common (2016).

Leaf-mine: April - May. July - Aug.
Narrow mine downwards until reaching water surface, when either returns upward or changes leaf.

[MBGBI vol3 p368]

Determination by Genitalia Examination (gen. det.) Required

Recorded in 5 (7%) of 69 10k Squares.
First Recorded in 1874.
Last Recorded in 2020.

Latest 5 Records
Date#VC10k Area
05/09/2020+27TG31 - Horning/Hoveton
25/05/2019228TL79 - Methwold/Foulden
24/05/2019128TL79 - Methwold/Foulden
14/08/2016128TL79 - Methwold/Foulden
11/08/2009+27TG32 - Stalham/Catfield
Further info: Elachista poae
 
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