Birch Sawfly - Cimbex femoratus


    Up to 25mm long, the largest British Sawfly. The adult is easily recognised by the pale band on its shiny black abdomen. Wings are smoky brown colour with dark brown margins. The antennae are yellow tipped.

    Identification difficulty

    Favours habitats where Birch trees are found.

    When to see it

    May to August

    Life History

    The solitary larvae feed on Silver Birch leaves between June and September and can grow up to 45mm in length. A black edged bluish stripe runs along the middle of the larva's back for the length of its body. There is a single row of black dots along the side of the body.

    UK Status

    Local throughout Britain, not very common.

    VC55 Status

    Uncommon 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