John Waters / Timelapse of flies and a slug on a Common stinkhorn fungus (Phallus impudicus), Mendips, Somerset, UK, July.

John Waters / Timelapse of flies feeding on the tip of a Common stinkhorn fungus (Phallus impudicus), Mendips, Somerset, UK, July.

Ammonite / Male Yellow dung flies (Scathophaga stercoraria) fighting over a female on a cowpat, UK.

Ammonite / Male Yellow dung flies (Scathophaga stercoraria) fighting over a female on a cowpat, UK.

Stephen Dalton / Horse fly (Tabanus sp) male taking off from poppy seed-head (Papaver rhoeas) Sussex, UK

Pal Hermansen / Hoverfly in flight, backlight, Norway, September.

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.

Denis-Huot / Lion (Panthera leo) male with bloody mane and flies, Masai-Mara Game Reserve, Kenya

Alex Hyde / Close-up of compound eyes of unidentified fly {Diptera}. Masoala Peninsula National Park, north east Madagascar.

Mark Bowler,Mark Bowler / Dead Houseflies {Musca domesticus} and Bluebottle flies {Calliphora vomitaria}, UK

Heather Angel / Common bee fly (Bombylius major) hovering whilst nectaring on Honesty (Lunaria annua), proboscis covered with pollen. Nature reserve, Surrey, England, UK. March.

David Woodfall / Long legged Flies (Dolidopodidae spp) on water in footprint of Longhorn Cattle, Knepp Rewildling Estate, West Sussex,England, UK.