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

    MAP KEY:

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

    UK Map