Gracillariidae : Gracillariinae
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Photo © Stephen Youngs,  04/04/2014 - Hethersett

Immature stages

Similar Norfolk Species
Caloptilia elongella
Alder Stilt
Caloptilia populetorum
Black-dot Stilt
Caloptilia hemidactylella
Scarce Maple Stilt
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Caloptilia betulicola
Birch Stilt

(Hering, 1927)283 / 15.005
=Red Birch Slender

Norfolk status
Local.
Very similar to C. elongella, separated with certainty only by dissection of the genitalia. The two species were not recognised as separate in this country until the 1940s (Brown, 1947)

Unicolorous forms are similar to C. elongella, while well marked forms with yellow are similar to C. hemidactylella and will require dissection.

Leaf-mine: July, September - early November
larva mines the leaves initially and then living inside a rolled leaf. (compare with C. populetorum, which makes longtudinal rolls.)

Determination by Genitalia Examination (gen. det.) Required

Mine: Either the leaf or a good photograph required

Recorded in 25 (34%) of 74 10k Squares.
First Recorded in 1986.
Last Recorded in 2024.
Additional Stats

Caloptilia elongella | Caloptilia rufipennella >

Determination
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10kGeneral Area
10/07/2024228TL99Merton
09/06/2024128TL99Great Hockham
19/03/2024128TF62Dersingham Bog
18/03/2024128TF63Dersingham
17/03/2024127TG10Cringleford / Intwood
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
Express Record Caloptilia betulicola
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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Wingspan: 14-16mm
Flight: Two Generations. June-July. Sep. Overwintering to reappear in spring.
Foodplant:   Birch.
Nat Status: Common
Verification Grade:  Adult: 4  Mine: L
 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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