Rod Williams / A mating pair of conopid flies (Sicus ferrugineus), New Cross Cutting, Lewisham, England, June

Rod Williams / Thick-headed Fly (Sicus ferrugineus) feeding on Bramble (Rubus) blossom, Brockley Cemetery, Lewisham, London, England, UK. May.

Rod Williams / Thick-headed flies (Sicus ferrugineus) mating pair, Brockley Cemetery, Lewisham, London, England, UK, July.

Andy Sands / Conopid fly (Sicus ferrugineus) parasitic fly whose larvae are endoparasites on various species of Bumblebee, Oxfordshire, England, UK, June

Rod Williams / Thick-headed fly (Sicus ferrugineus) on Ragwort Grooming Brockley Cemetery, Lewisham, London, UK. August

Rod Williams / Thick-headed flies (Sicus ferrugineus) mating pair on Wild marjoram (Origanum vulgare) Hutchinson's Bank, New Addington, London, UK August

Rod Williams / Thick-headed / Conopid fly (Sicus ferrugineus) feeding on ragwort, Lewisham, England, UK, August.

Rod Williams / Thick-headed / Conopid fly (Sicus ferrugineus) pair mating on ragwort, Lewisham, London, UK, July.

Rod Williams / Thick-headed / Conopid fly (Sicus ferrugineus) covered in ragwort pollen, Lewisham, London, UK, July.

Andy Sands / Thick headed fly (Sicus ferrugineus) portrait, Hertfordshire, England, UK. June. Focus stacked.