How the depth, speed, turbulence and turbidity of rivers influence the outcome of battles between predators and prey.
A spider that rolls down dunes; hyenas take advantage of seals on a beach.
Sardines herded by dolphins; coral reef fish trapped by predators; bubble-netting techniques of whales.
A peregrine falcon takes down a pigeon; a dragonfly works to outwit a hobby above a river in southern France.
Wetlands create a landscape in constant flux, merging wildlife combatants.
Cheetahs and gazelles in the African savannah; termites and anteaters in South America's pampas; wolves and bison in the Canadian prairies; foxes and rabbits on Wiltshire's man-made grasslands.
Visiting the Arctic and Antarctic where the constantly changing sea influences the battles fought; struggle of the polar bears as the ice melts.
The jungles of the world, one of the most complex habitats on earth.
The effect of coastal weather and the tide on battles; killer whales catch sea lions by beaching themselves.
Light and dark are the two conditions that affect every battleground.
A vast area of treeless plains in the Arctic; golden eagles attack mountain hares; barnacle geese.
The influence of people, traffic and lights in the outcome of battles between predators and prey.