Trials of Life S01E07 · Living Together

Overview

This 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 get dropped from above. In return, the deer serve as a lookout when the primates are feeding on the ground. Underwater, a hermit crab is shown adding sea anemones to its shell in order to protect itself from attack by an octopus, and a goby assists a virtually blind shrimp. Fleas, lice and mites are parasites: they share no mutual partnership and instead take advantage of creatures for food or shelter. However, parasites have their predators, and an example are the finches of the Galápagos Islands that clear the resident giant tortoises of their ticks, and oxpeckers, which do the same for giraffes in Africa (and even use its fur to line their nests). Some fish regularly clean others, and wrasse and shrimp appear to specialise in this regard, as do remora, which permanently hang on to their hosts. One parasite that grows inside its host is the fluke, and one is shown gestating inside a snail, having previously been unknowingly eaten. Because it needs to transfer to a bird's gut to develop further, it causes the snail to advertise its presence to allow itself to be consumed - thus completing the circle. However, some microscopic creatures inhabit the stomachs of large herbivores in order to break down the cellulose of their diet, thereby aiding their digestion.

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