Caloptilia populetorum

Alternative names
Clouded Slender

Wingspan 11 to14 mm. The adults resemble several other Caloptilia species and are best identified by the dark spots on the forewing leading edge and darker cilia.

Identification difficulty

A species of moorland and heath especially where Birch is present.

When to see it

The flight period is from August onwards, overwintering after which they may be seen until April or May.

Life History

Despite the scientific name, the larvae feed on birch (Betula) leaves, initially in a gallery and later rolling a leaf and feeding within.

UK Status

This species has a wide distribution over much of mainland Britain, but is not especially common. In the Butterfly Conservation's Microlepidoptera Report 2011 this species was classified as local.

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).

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Leicestershire & Rutland Map


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

UK Map