Twin-spot Centurion - Sargus bipunctatus


    This is our largest Sargus (wing length to 10mm). Thorax shiny metallic green, scutellum without spines, veins in the wing quite distinct. The male and female of this species differ considerably in appearance, males are very slim with a metallic green thorax and metallic bronze abdomen (like male Chloromyia formosa but with a much narrower build). Females have a broader build with the base of the abdomen extensively reddish contrasting with a blackish tip bearing blue reflections. Both sexes have orange legs and a pair of whitish spots on the frons just above the antennae.

    Identification difficulty
    Recording advice

    Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed.


    Low vegetation.  Adults can be found in a variety of open and wooded habitats, usually sunbathing on foliage in sheltered spots.

    When to see it

    August to early November.

    Life History

    The larvae have been reared from cow dung, compost, rotting vegetation and decaying fungi.

    UK Status

    This is a widespread and locally frequent species in England and Wales and is almost certainly under-recorded due to its late flight period.

    VC55 Status

    Fairly frequent but not 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