John Cancalosi / Large pile of old brake parts, Recycling center, Ithaca, New York, USA.

John Cancalosi / Close up of large pile of old disc brakes, Recycling Center, Ithaca, New York, USA, property released.

John Cancalosi / Pile of used tyres, Recycling Center, Ithaca, New York, USA, property released.

Yva Momatiuk & John Eastcott / Mustang (Equus caballus) foal sniffing stallion dung pile, Pryor Mountain Wild Horse Range, Montana

Yva Momatiuk & John Eastcott / Mustang (Equus caballus) foal sniffing stallion dung pile, Pryor Mountain Wild Horse Range, Montana

Piotr Naskrecki / Bronze Dung Beetle (Onitis alexis) on a pile of dried dung, Botswana

Piotr Naskrecki / Common Grass Yellow (Eurema hecabe) butterfly males gather on pile of dung to sip minerals, Guinea, West Africa

Mark Jones / Vicuna (Vicugna vicugna) three week old baby uses communal dung pile, Pampa Galeras National Reserve, Peruvian Andes, Peru

Tui De Roy / Vicuna (Vicugna vicugna) male inspecting dung pile, Llulita, Apurimac, Peruvian Andes, Peru

Nick Garbutt / Sulawesi black macaque / Celebes crested macaque (Macaca nigra) investigating pile of plastic bottles washed up on the beach, Tangkoko National Park, northern Sulawesi, Indonesia.

Nick Garbutt / Sulawesi black macaque / Celebes crested macaque (Macaca nigra) investigating pile of plastic bottles washed up on the beach, Tangkoko National Park, northern Sulawesi, Indonesia. Critically endangere...

Nick Garbutt / Sulawesi black macaque / Celebes crested macaque (Macaca nigra) investigating pile of plastic bottles washed up on the beach, Tangkoko National Park, northern Sulawesi, Indonesia. Critically endangere...