Flightless barnacle goose chicks face their greatest challenge at the start of their lives. In order to find food, they must leap 400 feet down a cliff ledge where they hatched.

Sir David Attenborough describes the pivotal moment when an animal has to make it on its own and learn to survive in the dangerous animal kingdom, where every small decision means the difference between life and death.

Animals must find somewhere to live: a place that provides shelter from the elements and a refuge from enemies. Good homes are rare and competition can be intense: finding a home is one thing, but defending it is quite another.

How animals try to gain a position of power in their worlds, where the most powerful have the best access to food and water, and are the most attractive to the opposite sex.

Competition to win a partner creates both the most extraordinary beauty and life-threatening violence anywhere in nature.

Examines how animals rear their offspring, an extraordinary commitment that may even risk the parent's own life. A female turtle hauls herself up the beach to lay her eggs in a safe place above the tide line.