Nature's Epic Journeys - Season 1

In the first episode, Liz Bonnin joins a thousand elephants - from magnificent bulls to vulnerable orphans - as they come together in a crucial annual gathering in Northern Kenya.

One hundred thousand caribou face starving bears and wolves, deadly frozen rivers and rugged mountains, as they undertake the world's longest land migration - 5000 kilometres through the frozen Arctic wilderness of Canada and Alaska.

Liz Bonnin leads a team of scientists and film-makers and uses cutting-edge technology to follow the herd, and reveal unique insights into the individual lives of these extraordinary animals.

The caribou must reach their calving grounds before they give birth; failure would spell disaster.

Thousands of zebra face lions, hunting dogs, drought and starvation as they undertake the world's most newly-discovered migration. Braving one of Botswana's most brutal wildernesses they make Africa's longest land migration to reach the rich grasslands of Nxai Pan National Park.

Liz Bonnin leads a team of scientists and film-makers, using cutting-edge technology to attempt something that has never been done before: follow the zebra, on the ground, every step of the way, and reveal the secrets behind this brand new discovery.

Nature's Epic Journeys, presented by Liz Bonnin, follows three iconic animals on three of the world's most breathtaking wildlife adventures. Each must overcome immense obstacles, from challenging terrain to hungry predators and sheer physical exhaustion.