Friends and Rivals • 1990 • episode "9/12" • Trials of Life

48:46

An examination of the diverse techniques employed by animals to disperse and protect offspring.

1990 • Nature

48:38

For animals, there is no greater challenge than surviving the vulnerable first years of life. This episode demonstrates that nature's solutions are as varied as those in human society.

1990 • Nature

49:28

The search for food in the animal world. With leaves defended by poisons and seeds clad in thorns, animals fight back in very innovative ways.

1990 • Nature

49:16

Life-and-death duels are fought daily in the wild: an orchid turns out to be a predator, killer whales ambush sea lions and chimps pursue colobus monkeys.

1990 • Nature

48:27

How animals ranging from albatrosses to ants can navigate themselves over long distances.

1990 • Nature

49:22

How all animal architects aim to keep both the elements and intruders at bay through features that include defensive moats.

1990 • Nature

49:13

Examining some of the weird relationships that develop between species, from birds that relieve clients of hangers-on to hermit crabs that enlist stinging anemones to repel octopuses.

1990 • Nature

49:00

How many animals - including zebras, moose and stalk-eyes flies - assess their opponents' fighting prowess before making an attack that risks injury or death.

1990 • Nature

47:45

From vampire bats to baboons, Sir David Attenborough investigates the importance of recognising friends and respecting the power of rivals throughout the animal kingdom.

1990 • Nature

49:25

From the love songs of fish to the flashes of millions of tiny beetles, Sir David Attenborough examines methods of communication used by animals.

1990 • Nature

48:57

This edition looks at the various methods employed by species to attract a mate, including whales that sing "songs", hamsters that emit an odour, and manakins that do acrobatic dances.

1990 • Nature

49:16

A look at the many and varied ways in which animals procreate in order to ensure that their genes are passed on to the next generation.

1990 • Nature

49:27

The inside of a termite mound proved especially challenging for Attenborough: it was so cramped that he could only face in one direction. He therefore had to slowly crawl backwards out of shot when performing re-takes.

1990 • Nature