Stigmella assimilella

Alternative names
Aspen Pigmy

Wingspan 5.4 to 6.2 mm. Adults difficult to distinguish from other Stigmella species, and more frequently recorded in the larval stage where it creates a leaf mine on the leaves of Aspen (Populus tremula).

Identification difficulty

Adult Leafmine


Where the larval foodplant Aspen occurs.

When to see it

The larval mine may be encountered when Aspen is in leaf.

Life History

Larva mines leaves of Aspen, over-wintering as a pupa.

UK Status

Local in wooded areas containing Aspen, mainly in south-eastern England and in the Scottish Highlands. 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 only 5 records to autumn 2017. 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