Stigmella samiatella

    Alternative names
    Chestnut Pigmy

    Wingspan 5 to 7 mm. This tiny purple-bronze moth is a member of the unicolorous ruficapitella group of Nepticulidae.

    Identification difficulty

    Adult Leafmine if on Sweet Chestnut (needs to be reared through if on Oak).

    ID guidance

    Leafmine occurs on Sweet Chestnut and on Oak.


    Where the larval foodplants occur.

    When to see it

    Adults in June and from July to August.

    Life History

    The larva creates a quite long and contorted gallery mine in oak (Quercus) or sweet chestnut (Castanea sativa), with the frass in a narrow central line towards the last quarter of its length. There are two generations, creating leaf mines in June/July and September/October.

    UK Status

    This species was until recently poorly recorded in Britain. As more studies have been undertaken, it has been found to be more widely present than previously thought. 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

    MAP KEY:

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

    UK Map