Caloptilia robustella

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.

Caloptilia alchimiella (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.

Usually in well wooded areas.

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

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

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

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