Trials of Life S01E12 · Continuing the Line

Overview

The final installment illustrates how species fulfill their ultimate raison d'être and ensure that their genes are passed on to the next generation. It is a universal problem, but one which has given rise to a variety of solutions. Barnacles cannot move, but each has both male and female sex cells, allowing each neighbour to be a potential mate. On the other end of the scale, a female elephant undergoes a long pregnancy - 22 months - and so wishes to ensure that her calf is fathered by a strong and proven male. She is therefore very choosy about her partner. A female chinchilla is even more so, and rejects an unwanted suitor by squirting urine in its face. Mating is a dangerous business when weapons are involved, and a male tarantula approaches his intended with trepidation. Only when he succeeds in holding off her poison fangs is he able to progress any further. For some, the right moments to get together are few and far between: a male crab, for example, must wait until a female moults her shell before he is able to fertilise her. Male sea lions are shown fighting over a harem, and some use the battle to their advantage by making off with reluctant females. Attenborough observes that the monogamous relationships enjoyed by humans are rare within the animal kingdom, but he highlights the Royal albatross as a "beautiful" exception. The pair of birds featured met as five-year-olds, and have been together for twenty years.

Torrents

Subtitles

Episodes

1. 1 1. Arriving1990-10-04 · 50mThe first episode examines the various methods by which creatures come into the world. Attenborough’s opening statement alludes to the annual spawning of the Christmas Island red c
2. 2 2. Growing Up1990-10-11 · 50mThis programme describes the ways that various species care for their young. Attenborough defines childhood as achieving two tasks: growing and surviving. He highlights the elephan
3. 3 3. Finding Food1990-10-18 · 50mThe next installment is devoted to the ways in which animals gather their sustenance. Attenborough begins in the South American rainforest, where the proliferation of animal and pl
4. 4 4. Hunting and Escaping1990-10-25 · 50mThis episode looks at those that hunt other creatures and ways of avoiding capture. Attenborough is attacked by a pair of skuas as he approaches their nest, which demonstrates this
5. 5 5. Finding the Way1990-11-01 · 50mThis programme explores forms of navigation. Attenborough starts in Africa at dusk, by describing some of the species that don't rely on sight. The spotted hyena uses its acute sen
6. 6 6. Home Making1990-11-08 · 50mThis installment deals with how animals construct their shelters from the elements and predators. Burrows and holes can provide considerable refuge, and Attenborough inspects the h
7. 7 7. Living Together1990-11-15 · 50mThis episode focuses on those species that co-operate and depend on (or exploit) others. Spotted deer follow langur monkeys as they travel from tree to tree, eating any leaves that
8. 8 8. Fighting1990-11-22 · 50mThis programme details how fighting - both physical and psychological - is used for food, land or to gain a mate. Territorial conflict is demonstrated by the hummingbird, and Atten
9. 9 9. Friends and Rivals1990-11-29 · 50mThis installment investigates the ways in which those animals that live in social groups interact with each other. The solitary eagle is contrasted with whooper swans landing in Sc
10. 10 10. Talking to Strangers1990-12-06 · 50mThis episode concentrates on communication. In Kenya, Attenborough accompanies a tribesman who calls to a honeyguide, which in turn answers him and leads the pair to a bees' nest.
11. 11 11. Courting1990-12-13 · 50mThis programme surveys the methods employed in attracting a mate, mainly those of birds. The Indian florican inhabits long grass, and so is difficult to see. In order to gain atten
12. 12 12. Continuing the Line1990-12-20 · 50mThe final installment illustrates how species fulfill their ultimate raison d'être and ensure that their genes are passed on to the next generation. It is a universal problem, but