Daniel Heuclin / Mosquito (Anopheles gambiae) feeding on human in controlled conditions. The body is becoming engorged with blood. Malaria vector. Africa, June. Engorging sequence 2 of 3. Model released

Alex Hyde / Cleg fly / Horsefly (Haematopota pluvialis) sucking blood from human.

Stephen Dalton / Mosquito (Culicidae) female feeding on human blood, controlled conditions

Konrad Wothe / Fly (Gymnosoma rotundatum) Bavaria, Germany. June.

Philippe Clement / Parasite fly / tachinid fly (Tachina fera) feeding on nectar from Hogweed (Heracleum sphondylium) in summer, France. August.

Naskrecki & Guyton / Parasitic fly (Raymondia sp.) on fur of Horseshoe bat (Rhinolophus mossambicus) from Gorongosa National Park, Mozambique

Naskrecki & Guyton / Parasitic fly (Raymondia sp.) on the wing membrane of the Horseshoe bat (Rhinolophus mossambicus) from Gorongosa National Park, Mozambique

Philippe Clement / Tachina flies (Tachina fera) nectaring on Umbellifer (Apiaceae) flowers in summer, Luxembourg, August.

Bernard Castelein / Fly (Eriothrix rufomaculata), KLein Schietveld, Brasschaat, Belgium. June

Rod Williams / Ladybird fly (Gymnosoma rotundatum) a rare / localised species Brockley Cemetery, Lewisham, London, England, UK. May.

Nick Upton / Swift lousefly (Craeterina pallida), a blood sucking parasite unique to swift nests, found on a Swift chick (Apus apus) and held in the hands of a bird ringer, Worlington, Suffolk, UK, July. Model rel...

Andy Sands / Tachnid fly (Phasia hemiptera) male, the female lays its eggs directly onto Forest Bugs and Green Shield Bugs where the larvae live as parasites, Hertfordshire, England, August

Andy Sands / Tachnid fly (Phasia hemiptera) male, the female lays its eggs directly onto Forest Bugs and Green Shield Bugs where the larvae live as parasites, Hertfordshire, England, August

Kim Taylor / Parasite fly (Tachina fera) on Eryngium. Surrey, England, UK, August.

Kim Taylor / Tachinid fly (Dexiosoma caninum). Surrey, England

Nick Upton / Tachinid fly (Nowickia ferox) with worn wings, chalk grassland meadow, Wiltshire, UK, July.

Andy Sands / Tachnid fly (Phyllomya volvulus) Resting on leaf after rain shower, Oxfordshire, England, UK, June

John Abbott / Tachinid or Parasitic fly (Epalpus signifer) flying Travis County, Texas, USA. Controlled conditions. September

John Abbott / Tachinid or parasitic fly (Epalpus signifer) flying Travis County, Texas, USA. Controlled conditions. September

Chris Mattison / Tarthuth (Cynomorium coccineum) a parasitic desert plant pollinated by flies. United Arab Emirates, February.

Nick Upton / Parasite fly / Tachinid fly (Zophomyia temula), a nationally scarce species, feeding on Common hogweed (Heracleum sphondylium) on grassland meadow cleared of scrub to improve the habitat for bees and...

Rod Williams / Tachinid Fly (Thelaira nigrina) Hutchinson's Bank, New Addington, London May

Rod Williams / Tachinid fly (Tachina fera) Feeding on ragwort Hutchinson's Bank, New Addington, London September

Rod Williams / Tachinid Fly (Linnaemya picta) Brockley Cemetery, Lewisham, London, UK. August

Rod Williams / Tachinid fly (Nowickia ferox) grooming on wild marjoram, Hutchinson's Bank, New Addington, London August

Rod Williams / Parasitic Fly (Phania funesta) Tachinidae On field bindweed Brockley Cemetery, Lewisham, London, UK. August

Rod Williams / Parasitic fly (Eriothrix rufomaculata) on Tansy (Tanacetum) Brockley, Lewisham, London, UK. July.

Solvin Zankl / Mosquito (Ochlerotatus japonicus) adult sucking blood, Freiburg, Germany. Invasive species.

Andy Sands / Tachnid fly (Prosena siberita) Berkshire, England, UK, August

Andy Sands / Tachnid fly (Phasia hemiptera) male feeding on flower of wild parsnip (pastinaca sativa), Oxfordshire, England, UK, August

Andy Sands / Tachnid fly (Phasia hemiptera) male feeding on flower of wild parsnip (Pastinaca sativa), Oxfordshire, England, UK, August

Andy Sands / Tachnid fly (Prosena siberita), Berkshire, England, UK, August

Rod Williams / Tachinid fly (Thelaira nigripes) Brockley Cemetery, Lewisham, London, UK August

Stephen Dalton / Fly (Alophora hemiptera) Sussex, UK

Nick Upton / Parasite fly / Tachinid fly (Tachina fera) a parasite of noctuid moths, feeding on Ragwort flowers (Senecio jacobaea) in a woodland clearing, GWT Lower Woods reserve, Gloucestershire, UK, September.

Nick Upton / Parasite fly / Tachinid fly (Gymnocheta viridis), a parasite of lepidopteran caterpillars, sunning on an ivy leaf on a woodland edge, Wiltshire, UK, April.

Rod Williams / Parasitic fly (Eriothrix rufomaculata) on Tansy flower, Brockley, Lewisham, London, England, August.

Rod Williams / Parasitic fly (Eriothrix rufomaculata) on tansy flower, Brockley, Lewisham, London, England, August.

Rod Williams / Female Tachinid fly (Cistogaster globosa) on Tansy flower, Brockley, Lewisham, London, England, August.

Konrad Wothe / Tachnid fly (Tachinidae) Panguana Reserve, Huanuca province, Amazon basin, Peru.

MYN / Gil Wizen / Louse fly (Hippobosca camelina), Carmel Mountain Range, Israel, April. Focus-stacked. meetyourneighbours.net project

Andy Sands / Tachnid fly (Tachina grossa) Surrey, England, UK. August.

Andy Sands / Tachnid fly (Tachina grossa) Surrey, England, UK. August.

Stephen Dalton / Parasitic fly (Dexia) Sussex, England, UK. July.

Rod Williams / Tachinid fly (Gymnosoma rotundatum) grooming, Brockley cemetery, Lewisham, London, UK, September.

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

Rod Williams / Tachinid fly (Tachina fera) Brockley cemetery, Lewisham, London, England, UK. May

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

John Abbott / Parasitic Fly (Tachina sp.) on white background, Missoula County, Montana, USA.

Stephen Dalton / Tachinid fly (Alophora hemiptera) parasitic species. Sussex, England, UK, August.

Stephen Dalton / Tachinid fly (Alophora) Sussex, England, UK, August.

Jussi Murtosaari / Deer fly (Lipoptena cervi) on human skin, South Karelia, southern Finland, September.

Rod Williams / Tachinid fly (Eriothrix rufomaculata) on daisy Lewisham, London, July

Rod Williams / Tachinid fly (Eriothrix rufomaculata) on daisy Lewisham, London, July

Rod Williams / Tachinid fly (Tachina fera) Lewisham, London,

Rod Williams / Tachinid fly (Tachina fera) Lewisham, London,

Paul Harcourt Davies / Common rufous parasite fly (Tachina fera) on flowers in garden, Orvieto, Italy, May

Paul Harcourt Davies / Common rufous parasite fly (Tachina fera) on flowers in garden, Orvieto, Italy, May

Nick Upton / Yellow dung fly (Scathophaga stercoraria) killed by pathogenic fungus of flies (Entomophthora muscae) clinging to a thistle leaf with wings spread, Wiltshire pastureland, UK, June.

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

Nick Upton / Parasite fly / Tachinid fly (Phasia hemiptera) a parasite of shieldbugs, feeding on ornamental flowers, Wiltshire garden, UK, August. . Property released.

Nick Upton / Parasite fly / Tachinid fly (Phasia hemiptera) a parasite of shieldbugs, feeding on ornamental flowers, Wiltshire garden, UK, August. . Property released.

Nick Upton / Parasite fly / Tachinid fly (Gymnosoma sp) a parasitoid of Shield bugs, feeding on Rock samphire / Sea Fennel flowers (Crithmum maritimum) Samos, Greece, August.

Piotr Naskrecki / Vampire Bat (Desmodus rotundus) with parasitic Louse Flies (Trichobius parasiticus) behind its ear, Sipaliwini, Surinam

Nick Upton / Parasite fly / Tachinid fly (Prosena siberita) with distinctive long proboscis, resting on Woolly thistle leaf (Cirsium eriophorum), chalk grassland meadow, Wiltshire, UK, July.

Nick Upton / 2020VISION / Parasite fly (Tachina fera), feeding on Mexican orange blossom (Choisya ternata) flowers in a garden, Wiltshire, England, UK, April . Property released.

Nick Upton / Big-headed fly (Eudorylas sp.) a parasite of teeehoppers, sunbasking on a leaf. Wiltshire garden, UK, May.

David Maitland / Pigeon louse fly (Ornithomya avicularia) amongst the feathers of a Tawny Owl (Strix aluco). Feltwell, Norfolk, UK.

Colin Varndell / Adult Common Rufous Parasitic Fly (Tachina fera) at rest on wayfaring tree leaf. Dorset, UK, August.

Andy Sands / Tachinid fly (Phasia hemiptera) male, the female lays its eggs directly onto Forest Bugs and Green Shield Bugs where the larvae live as parasites, Hertfordshire, England, August

Andy Sands / Tachinid fly (Phasia hemiptera) male, the female lays its eggs directly onto Forest Bugs and Green Shield Bugs where the larvae live as parasites, Hertfordshire, England, August

Kim Taylor / Parasitic Fly (Tachinidae) feeding on Hogweed (Heracleum sphondylium) flowers. Surrey, UK, June.

Daniel Heuclin / Mosquito (Anopheles gambiae) feeding on human in controlled conditions. The body is becoming engorged with blood. Malaria vector. Africa, June. Engorging sequence 3 of 3.

Daniel Heuclin / Mosquito (Anopheles gambiae) feeding on human in controlled conditions. Malaria vector. Africa, June. Engorging sequence 1 of 3.

Nick Upton / Parasite Fly / Tachinid Fly (Cylindromyia intermedia) feeding on Variegated Spurge (Euphorbia marginata) flowers. Lesbos / Lesvos, Greece, August.

Nick Upton / Parasite Fly / Tachinid Fly (Cylindromyia intermedia) feeding on Variegated Spurge (Euphorbia marginata) flowers. Lesbos / Lesvos, Greece, August.

Nick Upton / Bee Fly (Toxophora fasciculata) - a parasite of Potter Wasp larvae - standing on Variegated Spurge (Euphorbia marginata) flowers. Lesbos / Lesvos, Greece, August.

Nick Upton / Parasite Fly / Tachinid Fly (Cylindromyia intermedia) feeding on Variegated Spurge (Euphorbia marginata) flowers. Lesbos / Lesvos, Greece, August.

Nick Upton / Male Great pied hoverfly (Volucella pellucens), a parasite of wasp nests, resting on a leaf. Wiltshire garden, UK, June

Nick Upton / Hoverfly (Volucella bombylans var. plumata) mimicking a White-tailed bumblebee, standing on a leaf with front feet rasied. This hoverfly is a parasite of bumblebee and wasp nests. Wiltshire garden, UK...

Nick Upton / Male Great pied hoverfly (Volucella pellucens), a parasite of wasp nests, feeding from a Variegated mock orange (Philadelphus coronarius "aureus") flower. Wiltshire garden, UK, June

Nick Upton / Hoverfly (Volucella bombylans var. plumata) mimicking a White-tailed bumblebee, standing on a leaf. This hoverfly is a parasite of bumblebee and wasp nests. Wiltshire garden, UK, June

Nick Upton / Hoverfly (Volucella bombylans var. plumata) mimicking a White-tailed bumblebee, grooming its front legs while standing on a leaf. This hoverfly is a parasite of bumblebee and wasp nests. Wiltshire gar...

Nick Upton / Male Great pied hoverfly (Volucella pellucens), a parasite of wasp nests, feeding from a Variegated mock orange (Philadelphus coronarius "aureus") flower. Wiltshire garden, UK, June

Nick Upton / Parasite fly / Tachinid fly (Zophomyia temula), a nationally scarce species, with very worn wings, feeding on Common hogweed (Heracleum sphondylium) flowers. Wiltshire meadow, UK, June.

Nick Upton / Male Great pied hoverfly (Volucella pellucens), a parasite of wasp nests, feeding from a Variegated mock orange (Philadelphus coronarius "aureus") flower. Wiltshire garden, UK, June

Nick Upton / Parasite fly / Tachinid fly (Zophomyia temula), a nationally scarce species, sunbasking on a leaf in calcareous grassland. Wiltshire, UK, June.

Nick Upton / Parasite fly / Tachinid fly (Linnaemya sp.) female feeding on Wild angelica (Angelica sylvestris) umbel flowers. Corsica, France, June.

Nick Upton / Parasite fly / Tachinid fly (Cylindromyia bicolor) female feeding in profile on Wild angelica (Angelica sylvestris) umbel flowers. Corsica, France, June.

Will Watson / Tachinid fly (Tachina fera) on Hemp Agrimony (Eupatorium cannabinum), Herefordshire, England, UK

Nick Upton / Common Bee fly (Bombylius major) searching for solitary bee nest holes to parasitise. Wiltshire garden, UK, May.

Nick Upton / Common Bee Fly (Bombylius major) searching for solitary bee nest holes to parasitise. Wiltshire, UK, April.

Nick Upton / Parasite fly / Tachinid fly (Tachina fera) using proboscis to take nectar from Ivy (Hedera helix) flowers. Wiltshire garden, UK, September.

Nick Upton / Parasite fly / tachinid fly (Tachina fera) using proboscis to take nectar from Ivy (Hedera helix) flowers. Wiltshire garden, UK, September.

Nick Upton / Tachinid / Parasite fly (probably Ramonda spathulata) a parasitoid of noctuid moth caterpillars, Wiltshire, UK, June.

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.