Caloptilia alchimiella

Wingspan 10 to13 mm. The adults are difficult to distinguish from the recently separated Caloptilia robustella, 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.

Caloptilia robustella is very similar (see 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.

Areas where oak is present.

The flight period is from May to July, and the moths can sometimes be attracted to light.

The eggs of this species are laid on the leaves of oak (Quercus). When hatched, the larva at first mines the leaves in a gallery leading to a blotch. Subsequently the larva forms a succession of cones (usually three) by folding the tips of the leaves, and feeding within.

Seems to be widespread in Britain. In the Butterfly Conservation's Microlepidoptera Report 2011 this species was classified as common.

Occasional in Leicestershire and Rutland. L&R Moth Group status = C (very scarce resident or rare migrant).