The lengths some animals will go to continue their species by passing on their genes.
David Attenborough examines the dances, rituals and elaborate displays of sound and vision in animal courtship.
David Attenborough reveals the astounding methods of communication in the animal kingdom.
Recognizing friends and respecting authority is vital within the animal kingdom.
David Attenborough examines the fighting and ritualized encounters of animals.
Host David Attenborough explores some of the many ways animals form relationships.
Birds and animals build ingenious dwellings from available resources.
Host David Attenborough attempts to explain how animals find their way on global migrations with extraordinary accuracy.
Host David Attenborough examines the methods by which animals sharpen their skills as hunters and defend themselves as the hunted.
Availability of food helps determine behavior and survival strategies for animals.
From creches of bats to elephant babysitters, from chimpanzee games to protective lacebugs, nature's answers are as varied as those in human societies.
Evolution provides diversity for animals to give birth and care for their young.