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Caloptilia falconipennella
Scarce Alder Slender (Hübner, 1813)
Gracillariidae: Gracillariinae
289 / 15.011
Photo © Ben Lewis,  Brundall 22/03/11

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Similar Norfolk Species
Feathered Slender
Caloptilia cuculipennella
Clouded Slender
Caloptilia populetorum
Wingspan: 12-14mm
Flight: September to May, hibernating.
Foodplant:   Alder
Nat Status: Nationally Scarce B
Verification Grade:  Adult: 3  Mine: L
Norfolk Status
First recorded in Norfolk 2005. Fairly frequent with several spring records per year.

Caloptilia falconipennella is seasonally dimorphic, with spring and summer forms. The summer form has a sharply defined yellow costal blotch and is apparently rare in Norfolk, with very few records. This is faint or absent from the spring form, except for the oblique front edge defining a darker basal area.

The summer form is very similar to the early spring species, Caloptilia hemidactylella

Nationally scarce (Nb) in marshes, river-banks, ditches and other damp areas throughout Britain.

Leaf-mine: July - Aug. Alnus glutinosa (Alder), Alnus cordata (Italian Alder)

Retained Specimen / Photograph will be Required.

Mine: Either the leaf or a good photograph required

Recorded in 30 (43%) of 69 10k Squares.
First Recorded in 2005.
Last Recorded in 2020.

Latest 5 Records
Date#VC10k Area
31/10/2020127TG10 - Wymondham/Cringleford
23/10/2020+27TG20 - Norwich
08/08/2020127TG23 - N.Walsham/Roughton
02/08/2020127TG11 - Drayton/Swannington
13/07/2020127TG24 - Cromer
Further info: Caloptilia falconipennella
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