Alder Sawfly - Eriocampa ovata


    Size 10mm. The adult sawfly has a black head and abdomen and dark orange thorax

    Identification difficulty

    Around Alder trees

    When to see it

    May to August

    Life History

    The larvae are up to 2 cm long and covered in a white powdery substance. They camouflage themselves as bird droppings. The white powdery substance is easily rubbed off and in the final instar, when feeding is finished, the white powder is lost and the larva adopts a pale green appearance. There are two generations each year.

    UK Status

    Most records come from the south of Britain.

    VC55 Status

    Common in Leicestershire and Rutland.

    Leicestershire & Rutland Map

    MAP KEY:

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

    UK Map