Mound-building termites

A mound or 'ant hill' (informal) in Australia
Mounds formed from the old wooden poles of the Cape York telegraph line.
Mounds in the Bungle Bungle Range in Western Australia
A mound in Mount Irvine, New South Wales, Australia.
A mound in Senegal
A mound in Nigeria

Mound-building termites are a group of termite species that live in mounds, also informally but unscientifically called 'ant hills', which are made of a combination of soil, termite saliva and dung. These termites live in Africa, Australia and South America. The mounds sometimes have a diameter of 30 metres (98 ft). Most of the mounds are in well-drained areas. Termite mounds usually outlive the colonies themselves. If the inner tunnels of the nest are exposed it is usually dead. Sometimes other colonies, of the same or different species, occupy a mound after the original builders' deaths.