Twin-spot Centurion Soldier Fly (Sargus bipunctatus) Fulbourn Fen NR

Description
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.
Habitat
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…Nature spot

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Yellow dung fly (scathophaga stercoraria)

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Description
The male is golden yellow, whilst the female has a greener appearance and is less furry.
Habitat
It is very common in cattle farming areas.
When to see it
March to November peaking in summer.
Life History
The adult fly is mainly carnivorous and catches smaller insects, though also eats nectar. As the name suggests, this fly lays its eggs mainly on cowpats.
UK Status
Very common and widespread in Britain.

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Rhingia campestris

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The genus is easily recognised by its long snout. With Rhingia campestris the abdomen usually has a black line or stripe along the axis, but always along the lateral margins of the tergites. It has a largely orange abdomen and dark thorax.

Where to see it

Near to hedgerows, woodland edges.
When to see it
April to October. Peaking late May/early June and late August/early September.
Life History
The larvae breed in cow dung where they are exceedingly well camouflaged in the surface layer.

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