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Caloptilia alchimiella
Oak Stilt (Scopoli, 1763)
Gracillariidae: Gracillariinae
286 / 15.008
Photo © Dave Appleton,  31/08/2015 - North Elmham - male (gen det)

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Similar Species
Shaded Oak Stilt
Caloptilia robustella
Wingspan: 10-13mm
Flight: May - July (possibly as two separate broods)
Foodplant:   Oak
Nat Status: Common
Verification Grade:  Adult: 4  Mine: R
Status
Difficult to distinguish from the recently separated C. robustella Determination by Genitalia Examination (gen. det.) Required.

please record all undetermined specimens as the aggregate Caloptilia alchimiella/robustella

Leaf-mine: July - Oct.
Narrow gallery leading to a squarish or triangular blotch. Then forms up to three successive cones by folding the lobe of a leaf downwards.
Note: You cannot separate these from C. robustella unless you examine the pupa or breed out.

Determination by Genitalia Examination Required

Mine: Moth needs to be reared and, in some cases, possibly dissected.

Recorded in 22 (30%) of 74 10k Squares.
First Recorded in 1874.
Last Recorded in 2023.

Latest 10 Records
Date#VC10kArea
21/08/2023128TL78Weeting Heath (Gravelpit Wood)
09/08/2023128TL78Weeting Heath (Gravelpit Wood)
07/08/2023128TL78Weeting Heath (Gravelpit Wood)
17/08/2022128TF92North Elmham
14/08/2022128TF92North Elmham
08/08/2022128TF63Dersingham
01/08/2022127TG02Hindolveston
25/07/2022127TG11Costessey
18/07/2022127TG14Sheringham / Beeston
17/06/2022128TF72Grimston
Further info: Caloptilia alchimiella
 
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