Gracillariidae : Gracillariinae
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Photo © Lynnette Nicholson, Mark Golley,  08/08/2022 - Cley

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Immature stages

Similar Norfolk Species
Caloptilia elongella
Alder Stilt
Caloptilia falconipennella
Dark Alder Stilt
Caloptilia honoratella
Pale Maple Stilt
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Caloptilia semifascia
Maple Stilt

(Haworth, 1828)290 / 15.012
=Maple Slender

Norfolk status
Local.

Now thought to be bivoltine in some counties including Norfolk with two distinct forms for each brood.
The Summer brood showing a yellow squared costal blotch/band while the Autumn (hibernating) second brood shows a distinctive angled light streak starting at the leading edge of the forewing.

Please note: There are several similar European Caloptilia species, and UK specimens may require dissection to separate yellow banded summer broods if they are recorded in the UK. [C.W. Plant (2022) Ent. Rec. 134]

Scattered VC27 records. First confirmed VC28 record in 2013 when cones were collected on Silver Maple at Lynford Arboretum and bred through. This is thought to be a new foodplant record for this species. (I. Barton, K. Rosewarne)

Leaf-mine: June-July
gallery leading to a squarish blotch, later forming up to 3 leaf tubes/cones.

On Sycamore, the feeding signs can also be confused with those of C. rufipennella and will need rearing to confirm.

The rare C. hemidactylella can only be separated as mines from C. semifascia by rearing through.

Morphology and DNA barcodes show that Calybites hauderi does not occur in the British Isles, but are the first brood of bivoltine Caloptilia semifascia. [Langmaid et al. 2011. Nota Lepidopterologica 33, 191-197].

[MBGBI Vol2 p268]

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

Recorded in 45 (61%) of 74 10k Squares.
First Recorded in 1874.
Last Recorded in 2024.
Additional Stats

Caloptilia falconipennella | Caloptilia hemidactylella >

Determination
First and second brood comparison - J R Langmaid (Nota Lep. 33)
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10kGeneral Area
29/06/2024128TL99Rockland St Peter
26/06/2024128TF63Hunstanton
24/06/2024128TL99Rockland St Peter
30/04/2024128TF74Titchwell
13/04/2024127TG20Poringland
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Wingspan: 10-12mm
Flight: Sept - May (hibernates)
Foodplant:   Field Maple, Sycamore, Silver Maple, Norway Maple
Nat Status: Local
Verification Grade:  Adult: 2/4  Mine: R
 Immature Adult   [Show Flight Times]

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Underlying maps using Digital Map Data © NOLA™ 2024. © Lepidoptera UK - Jim Wheeler - Norfolk Moths 2007 - 2024. Data © NOLA™ 2024
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