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.

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

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.

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.

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...

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) cleaning itself on apple and regurgitating. UK

Steve Downer / Fruit fly (Drosophila melanogaster) reguritating on apple and walking away.

Steve Downer / Fruit fly (Drosophila melanogaster) grooming itself on apple. UK.

Steve Downer / Close-up larva of Fruit fly (Drosophila melanogaster) showing mouth parts. UK

Steve Downer / Close-up larva of Fruit fly (Drosophila melanogaster) showing internal structure, UK

Steve Downer / Larva of Fruit fly (Drosophila melanogaster) feeding on apple, UK.

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

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

Michael Durham / Female Spotted wing fruit fly (Drosophila suzukii) in flight over a strawberry, Oregon, USA, March.

Stephen Dalton / Fruit fly (Drosophila melanogaster) in flight having just taken-off from strawberry, controlled conditions.