Wild Workers

A look at how wild creatures construct the foundations of the environment; herds of bison maintain prairies in North America; giraffes prune trees in Africa; the importance of great migrations in Africa; the clearance by vultures and dung beetles.

A look at how animals work together to construct their homes and shelters; the orangutan makes a secure sleeping platforms in the trees in South-East Asia; weaver birds make communal nests in southern Africa; the beaver is a great master builder.

A look at how animals work together to make empires, where some are so extensive they can be seen from space; humans have constructed their concrete jungles, but must choose to make room for the wild workers of the world.