Caloptilia robustella

Alternative names
New Oak Slender
Description

Wingspan 10 to13 mm. Very similar to the related Caloptilia alchimiella, differing in several subtle ways including the yellow blotch on the forewing, which is shorter and less clearly defined in this species. However, to be certain of identification, dissection of genitalia is necessary.  Where dissection has not taken place, records should be submitted as Caloptilia robustella - alchimiella agg.

Similar Species

Caloptilia alchimiella (see recording advice)

Identification difficulty
Recording advice

To be certain of identification, dissection of genitalia is necessary.  Where dissection has not taken place, records should be submitted as Caloptilia robustella - alchimiella agg.

Habitat

Usually in well wooded areas.

When to see it

The adult moths occur in a number of generations, any time between April and November.

Life History

The larva mines a leaf of oak, beech or sweet chestnut.

UK Status

Fairly frequent in Britain. In the Butterfly Conservation's Microlepidoptera Report 2011 this species was classified as common.

VC55 Status

It appears to be uncommon in Leicestershire and Rutland, where there are few records. L&R Moth Group status = D (rare or rarely recorded).

Reference
15.009 BF287

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Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map