Rod Williams / A mating pair of conopid flies (Sicus ferrugineus), New Cross Cutting, Lewisham, England, June
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Rod Williams / Thick-headed Fly (Sicus ferrugineus) feeding on Bramble (Rubus) blossom, Brockley Cemetery, Lewisham, London, England, UK. May.
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Rod Williams / Thick-headed flies (Sicus ferrugineus) mating pair, Brockley Cemetery, Lewisham, London, England, UK, July.
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Andy Sands / Conopid fly (Sicus ferrugineus) parasitic fly whose larvae are endoparasites on various species of Bumblebee, Oxfordshire, England, UK, June
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Rod Williams / Thick-headed fly (Sicus ferrugineus) on Ragwort Grooming Brockley Cemetery, Lewisham, London, UK. August
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Rod Williams / Thick-headed flies (Sicus ferrugineus) mating pair on Wild marjoram (Origanum vulgare) Hutchinson's Bank, New Addington, London, UK August
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Rod Williams / Thick-headed / Conopid fly (Sicus ferrugineus) feeding on ragwort, Lewisham, England, UK, August.
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Rod Williams / Thick-headed / Conopid fly (Sicus ferrugineus) pair mating on ragwort, Lewisham, London, UK, July.
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Rod Williams / Thick-headed / Conopid fly (Sicus ferrugineus) covered in ragwort pollen, Lewisham, London, UK, July.
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Andy Sands / Hoverfly (Sicus ferrugineus). This fly deposits its eggs on various species of bumble bee that serve as hosts for the parasitic larvae. Hertfordshire, England, June.
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Nick Upton / Conopid / Thick-headed fly (Sicus ferrugineus) a parasite of bumblebees, resting on St. John's wort flower (Hypericum sp.). Wiltshire garden, UK, July.