Nick Upton / Close up of a male Yellow dung fly (Scathophaga stercoraria) climbing up to the top of some sheep dung, Wiltshire, England, UK, March. Slow motion clip.

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.

Chris Gomersall / 2020VISION / Northern wheatear (Oenanthe oenanthe) adult male in spring plumage feeding on dung flies at farm midden heap, Hertfordshire, UK, April

Chris Gomersall / 2020VISION / Yellow wagtail (Motacilla flava flavissima) adult male in spring plumage feeding on dung flies at farm midden heap, Hertfordshire, UK, April. Did you know? Yellow wagtails commonly used to nest in wat...

Chris Gomersall / 2020VISION / Northern wheatear (Oenanthe oenanthe) adult male in spring plumage feeding on dung flies at farm midden heap, Hertfordshire, UK, April

Chris Gomersall / 2020VISION / Adult male Northern wheatear (Oenanthe oenanthe) with ruffled plumage feeding on flies from a manure pile, backlit, Hertfordshire, England, UK, April

Cyril Ruoso / Crimson clover (Trifolium incarnatum), grown as green manure. Yonne, Bourgogne-Franche-Comte, France. April.

David Woodfall / Manure, mixed with straw ready to spread on machair, sandy farmland. North Uist, Scotland, UK, June.

David Perpinan / Southern lapwing (Vanellus chilensis) arriving at nest and incubating eggs, Pantanal, Mato Grosso do Sul, Brazil.

Ashley Cooper / Subsistence farming in the Annapurna Himalayas in Nepal. The terracing has been developed over centuries to farm this steep mountain land.

Ashley Cooper / Ashram's bio-gas plant, that is fed with food waste and manure and fuels the kitchens and the Ashram's vehicles. Muni Seva Ashram,Goraj, near Vadodara, India,