Splayed Deerfly - Chrysops caecutiens


    Length 8.5 to 10 mm. The females have a characteristic splayed v-shaped marking on tergite 2. Males have the abdomen almost entirely black, though tergite 2 is narrowly orange at its sides; the male mid tibiae are normally entirely black.

    Identification difficulty

    It can occur in a variety of habitats but often in damp or well wooded places.

    When to see it

    They are active from May to September

    Life History

    The predatory larvae live in wet mud and debris at the edges of streams and pools. This is one of our two frequent deerflies and with a strongly developed taste for human blood.

    UK Status

    Widespread and fairly frequent in much of England and Wales, though less common from Cumbria northwards.

    VC55 Status

    Fairly frequent but not well recorded in Leicestershire and Rutland.

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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