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Caloptilia betulicola
Birch Stilt (Hering, 1927)
Gracillariidae: Gracillariinae
283 / 15.005
Photo © Dave Appleton,  08/04/2016 - Alderford Common (male, gen det)

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Similar Species
Alder Stilt
Caloptilia elongella
Rufous Stilt
Caloptilia rufipennella
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
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 Required

Mine: Either the leaf or a good photograph required

Recorded in 27 (36%) of 74 10k Squares.
First Recorded in 1986.
Last Recorded in 2025.
Additional Stats

Latest 10 Records
Date#VC10kArea
21/03/2025+28TF63Dersingham
08/03/2025128TF63Dersingham
29/10/2024128TF63Dersingham
01/10/2024128TL99Rockland St Peter
22/09/2024228TF63Dersingham
06/09/2024228TF63Dersingham
04/09/2024628TL98Bridgham
28/08/2024128TF62Sandringham
05/08/2024128TF92North Elmham
21/07/2024128TL88West Tofts Heath
Further info: Caloptilia betulicola
 
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