MYN / Piotr Naskrecki / Long legged fly (Condylostylus sp) portrait, Concord, Massachusetts, USA, June. meetyourneighbours.net project

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

Andy Sands / Bee killer fly (Myopa buccata) sitting in wait for passing Bee, Hertfordshire, England, UK, May. Focus Stacked Image

Bernard Castelein / Fly (Physocephala rufipes), Klein Schietveld, Brasschaat, Belgium. August

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.

Rod Williams / Conopid fly (Myopa pellucida) on dandelion, Beverley Court Gardens, London, England, UK. April.

Rod Williams / Parasitic fly (Conops quadrifasciatus) parasite of Red-tailed Bumblebee Brockley cemetery, Lewisham, South East London, England, UK, August.

Kim Taylor / Thick-headed fly (Physocephala furcillata) on Eryingium. Surrey, England, UK, August.

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

Alan Williams / Thick-headed Fly (Leopoldius signatus of family Conopidae) pair mating on Ivy (Hedera helix) leaf Cheshire UK September 59749

Alan Williams / Thick-headed fly (Conops quadrifasciatus) resting on leaf at woodland edge Cheshire, UK, July

Rod Williams / Thick-headed fly (Conops ceriaeformis) female, Brockley Cemetery, Lewisham, London, UK. August

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

Nick Upton / Thick-headed fly (Physocephala rufipes), a parasite of bees, feeding on Japanese mock orange flowers (Pittosporum tobira), Lesbos/ Lesvos, Greece, May.

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 fly (Physocephala rufipes) feeding on Black knapweed (Centaurea nigra) flower, Sutcliffe Park, Eltham, London, England, June.

Jussi Murtosaari / Flies (Brachycera) on leaf, Parikkala, Etela-Karjala / South Karelia, Etela-Suomi / South Finland, Finland. June

Jussi Murtosaari / Fly (Brachycera) on Lily of the Valley berries, Parikkala, Etela-Karjala / South Karelia, Etela-Suomi / South Finland, Finland. September

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.

Robert Thompson / Conopid fly (Myopa buccata) near Viscos, Pyrenees National Park, Hautes Pyrenees, France, June.

Nick Upton / Thick-headed fly / Wasp fly / Conopid fly (Myopa sp.) a parasite of bees, sunbasking on a leaf, Wiltshire garden, UK, April.

MYN / Piotr Naskrecki / Long legged fly (Condylostylus sp) Concord, Massachusetts, USA, June. meetyourneighbours.net project

MYN / Piotr Naskrecki / Long legged fly (Condylostylus sp) Concord, Massachusetts, USA, June. meetyourneighbours.net project

Nick Upton / Thick-headed fly / Wasp fly / Conopid fly (Leopoldius signatus) a wasp-mimic parasitoid of adult vespid wasps, resting on Ivy leaves (Hedera helix). Wiltshire garden, UK, September.

Stephen Dalton / Thick headed fly (Physocephala nigra) in flight, controlled conditions.

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.

Doug Wechsler / Long-legged Fly (Condylostylus sp.) on Common milkweed leaf, Pennsylvania, USA

Premaphotos / Fly (Dolichopus wahlbergi) feeding on an enchytraeid worm, UK

Premaphotos / Thick headed fly (Thecophora atra) on a Fleabane flower, UK

Premaphotos / Common wasp / thick-headed fly (Conops quadrifasciata), male riding on the female's back but not mating, UK

Premaphotos / Long-legged fly (Argyra diaphana) male, UK

Premaphotos / Thick-headed fly (Physocephala rufipes) mating pair, UK

Premaphotos / Thick-headed fly (Myopa testacea) on flower, UK

Premaphotos / Glittering green fly (Poecilobothrus nobilitatus), male grooming his genitals, UK

Premaphotos / Common wasp fly, a thick-headed fly (Conops quadrifasciata) mating pair, UK

Premaphotos / Thick-headed fly (Myopa testacea) mating pair, UK

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

Nick Upton / Yellow banded conops flies (Conops quadrifasciatus) pair, mating on a scabious flowerhead in a garden, Wiltshire, UK. July.

Jiri Lochman / Conopid fly (Conops sp.) a wasp mimick, resting on plant, Dryandra Forest, Western Australia.

Doug Wechsler / Thick-headed fly (Physocephala tibialis) a wasp mimic, resting on leaf, Pennsylvania, USA. September.

Nick Upton / Conopid / Thick-headed fly (Myopus pellucida) a parasite of mining bees, sunning on a Honeysuckle leaf in a garden, Wiltshire, UK, April.

Guy Edwardes / Thick-headed fly or Wasp fly (Myopa sp.), pair mating, Westhay, Somerset Levels, Somerset, England, UK, June.