Floris van Breugel / Alkali fly (Ephydra hians) underwater in protective air bubble, Mono Lake, California, USA.

James Dunbar / Close up of a Cryptic mantis (Sibylla pretiosia) catching and eating a fruit fly, UK. Captive.

James Dunbar / Close up of a Cryptic mantis (Sibylla pretiosia) catching and eating a fruit fly, UK. Captive.

Jeff Vanuga / Ephydrid flies (Ephydra sp) that eat microscopic algae and survives during the winter in thermal pools. Biscut Basin, Yellowstone National Park, Wyoming, USA, January.

Steve Downer / Fruit fly (Drosophila melanogaster) close-up of eye.

Rod Williams / Spectacled berry fly (Anomoia purmunda) on Reed blade. Sutcliffe Park Nature Reserve, Eltham, London, England, UK. August.

Andy Sands / Phoenix fly (Dorycera graminum) Britain's largest ulidiid fly an uncommon species of unimproved grasslands, Hertfordshire, England, UK, June - Focus Stacked

Andy Sands / Parasitic fly (Cacoxenus indagator) a small fly that is a cleptoparasite of red mason bees, Hertfordshire, England, UK, April - Focus Stacked

Rod Williams / Celery Fly (Euleia heraclei) Brockley Cemetery, Lewisham, London, England, UK. May.

Doug Wechsler / Stilt-legged fly (Rainieria antennaepes) Fort Washington State Park, Pennsylvania, USA, July.

Andy Sands / Snail Killing Fly (Sciomyzidae sp.) perched on reed stem above pond, Hertfordshire, England, UK, August

Andy Sands / Snail killing fly (Sciomyzidae sp.) perched on reed stem above pond, East Sussex, England, UK, July. Focus Stacked

Nick Upton / Gall fly / Greater fruit fly (Terellia longicauda) female on the unopened flowerhead of a Woolly thistle (Cirsium eriophorum), the host plant for its larvae, chalk grassland meadow, Wiltshire, UK, Jul...

Marie Read / California Gull (Larus californicus), foraging for alkali flies (Ephydra hians) by running through swarm snapping its bill, on the shore at Mono Lake, California, USA. Digital frame expansion.

Konrad Wothe / Fruit fly (Drosophila melanogaster) male, Germany, August.

Jeff Foott / Ephydrid fly on algae mat, hot spring eaten by the wolf spider in hot spring run off. Yellowstone National Park, USA, July.

Rod Williams / Snail-killing fly (Tetanocera Sp) Sutcliffe Park Nature Reserve, Eltham, London, England, UK. August.

Rod Williams / Black scavenger fly (Sepsis punctum) feeding on minute food particles off bramble leaf, Brockley Cemetery, Lewisham, London, England, UK. October.

Floris van Breugel / Alkali fly (Ephydra hians) underwater in protective air bubble. Mono Lake, California, USA. June.

Floris van Breugel / Alkali flies (Ephydra hians) caught in an insect net, Mono Lake, California, USA.

Floris van Breugel / Alkali fly (Ephydra hians) Mono Lake, California, USA.

Floris van Breugel / Alkali flies (Ephydra hians) Mono Lake, California, USA.

Floris van Breugel / Alkali flies (Ephydra hians) on water at Mono Lake, California, USA. July.

Floris van Breugel / Mono Lake, with the abundant Alkali flies (Ephydra hians) Mono Lake, California, USA. September.

Floris van Breugel / Alkali flies (Ephydra hians) taking flight. Mono Lake, California, USA. July.

Floris van Breugel / Alkali fly (Ephydra hians) (top right), underwater in its air bubble, and pupal casings left behind by alkali fly larvae that have hatched into adults. The green is from algae that is trapped inside o...

Doug Wechsler / Vinegar flies / Fruit flies (Drosophila sp.) feeding on fermented sap or alcohol flux, Fort Washington State Park, Montgomery County, Pennsylvania, USA, June.

Rod Williams / Tephritid fly (Terellia tussilaginis) Brockley Cemetery, Lewisham, London, England, UK July 2016

Kim Taylor / Burdock gall Fly (Terellia tussilaginis) female. Surrey, England, UK, July,

James Dunbar / Close up of a Cryptic mantis (Sibylla pretiosia) catching and eating a fruit fly, UK. Captive.

James Dunbar / Close up of a Cryptic mantis (Sibylla pretiosia) catching and eating a fruit fly, UK. Captive.

James Dunbar / Close up of a Cryptic mantis (Sibylla pretiosia) catching and eating a fruit fly, UK. Captive.

James Dunbar / Close up of a Cryptic mantis (Sibylla pretiosia) catching and eating a fruit fly, UK. Captive.

Floris van Breugel / High speed exposure of a Fruit fly (Drosophila melanogaster) taken through a microscope. In this image flight muscles express a genetically engineered protein called GCaMP, which fluoresces green in t...

Floris van Breugel / Fruit fly (Drosophila melanogaster) female (left) and male (right) California Institute of Technology, USA, December 2016.

Floris van Breugel / Fruit fly (Drosophila melanogaster) tethered in LED illuminated chamber which stimulates moving visual patterns. Behind the fly is a camera, which is used to record its wing beat amplitude – a rough m...

Floris van Breugel / Fruit fly (Drosophila melanogaster) tethered to a tungsten pin. Despite not going anywhere, the fly will flap its wings, and respond to visual scenery as if it were in fact moving. This is a common ap...

Jurgen Freund / Focus stack of Hammerhead Fly (Diopsidae) Queensland, Australia.

Nigel Cattlin / Mediterranean fruit fly (Ceratitis capitata) feeding on Orange fruit

Nigel Cattlin / Mediterranean fruit fly larva (Ceratitis capitata) in Peach (Prunus persica) larva in decomposing Peach (Prunus persica) fruit

Nigel Cattlin / Mediterranean fruit fly (Ceratitis capitata) feeding on Orange fruit. October.

Jiri Lochman / Mediterranean fruit fly (Ceratitis capitata) larvae in apricot fruit Introduced pest species in Australia.

Jiri Lochman / Mediterranean fruit fly (Ceratitis capitata) female laying eggs into a papaya fruit Introduced pest species in Australia.

Jiri Lochman / Mediterranean fruit fly (Ceratitis capitata) feeding on unripe papaya fruit. Introduced pest species in Australia.

Jiri Lochman / Mediterranean fruit fly (Ceratitis capitata) female laying eggs into a papaya fruit. Introduced pest species in Australia.

Jiri Lochman / Mediterranean fruit fly (Ceratitis capitata) female laying eggs into a papaya fruit. Introduced pest species in Australia.

Jiri Lochman / Mediterranean fruit fly (Ceratitis capitata) pupae. Introduced pest species in Australia.

Jiri Lochman / Mediterranean fruit fly (Ceratitis capitata) pupa. Introduced pest species in Australia.