15.012 BF290 - Gracillariidae - Gracillariinae - Caloptilia semifascia - Maple Stilt

15.012 BF290 - Gracillariidae - Gracillarinae - Caloptilia semifascia - Maple Stilt - (Haworth, 1828)

Adult Micro: CAT 2 - Confusion Species - Leaf-miner: CAT L - The leaf or a Photo required -

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- Rare / Uncommon / Scarce - Leaf Miner

Taxonomy: Micro >> Gracillariidae

Other Name/s: Maple Slender

ID Difficulty: amber

- care required in the identification process, as confusion with similar species is likely - quality photographs required.
Confusion Species: Caloptilia falconipennella (Dark Alder Stilt); Caloptilia honoratella (Pale Maple Stilt)

ID pointers: Another Caloptilia that is Orangey-brown or Orangey-yellow in colour with an angled light yellow streak from the leading edge of the forewing is a good indicator.

Distribution: (Last record: 07/02/2024 at Sandiacre ) - Uncertain due to lack of data – 1st VC57 leaf mine 10/7/2015 ; 2nd record Findern 6/9/2023 and one record in 2024 – Very localised due to restricted areas where Field Maple exists.

Flight Period: July / August / September / October / - Late July to October before hibernating to following spring – Restricted to areas where Field Maple is common so a localised species in the recording area

Mine Period: June / July / - The larvae create a gallery min in the leaf at first before then creating a leaf cone followed by a leaf roll – beware of feeding signs of C.Rufipennella on Sycamore which can be confusing.

Moth Activity: Cathemeral - and is attracted to light

*** Last updated on 26 February 2025 by TD ***

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Wingspan: 10-12mm

Food Plant: Field Maple, other Maple species and Sycamore

Last Recorded Date: 07/02/2024

Last Recorded By: Paul Buxton

Last Recorded General Area: Sandiacre

No First Date Information Recorded

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