Natural World - Season 26 (2008)

The gharial, the world's oldest crocodilian, is on the very edge of extinction. These bizarre fish-eating reptiles that live in India's rivers have been decimated by a mystery die-off. Reptile expert Rom Whitaker has spent several decades battling to save the gharial. He and his team attempt to discover the cause of the die-off and ensure the future of the species through breeding in captivity.

Wildlife film. Every time we weigh up which bottle of wine to buy, we hold the fate of nightingales, rare black storks, secretive wild cats and one of the world's most remarkable trees in our hands. It has all to do with the stopper. If it is cork, it probably came from the bark of one of the ancient cork oak trees from the Montados, in the Alentejo region of Portugal. The cork oak is the only tree in the world whose bark can be periodically removed without killing it. But this tree is amazing in other ways. It survives in poor soil and searing heat, and provides not ...

Wildlife film. South African naturalist Mike Rutzen is crazy about great white sharks. He never saw Jaws, so he doesn't share the terror that has made these sharks the world's most feared predator. For ten years Mike has been swimming with great whites, without the protection of a cage. He has spent so much time in their company that he has learned to read their body language and to think like a shark. It is this knowledge that keeps him safe. Mike's quest to understand them better now takes him into the heart of a seal ambush site where he hopes to witness their ...

Cambridge ornithology professor Nick Davies helps David Attenborough explain the parasitical brood-behavior of the cuckoo. It specifically targets 20 European species (4 British, including the warbler) and lays an egg (extremely similar to the other birds) in the nest. This hatches only to kill the hosts' own offspring and steal all of the food provided, possibly by producing a fast feeding call simulating a whole brood. The study intends to understand the sharply declining species.

Wildlife documentary. Environmentalist and photographer, Sandesh Kadur, has traded a comfortable career in the family business to explore the natural wonders of the Western Ghats mountains. Just a few hours drive from the commercial bustle of his native Bangalore, Sandesh could be a world away. The monsoon pours six meters of rainfall each year on the remote peaks and isolated valleys of the Ghats. Alongside familiar Indian species like elephants, tigers and peacocks are more mysterious creatures that are found nowhere else: a purple frog with a face like a shrew and ...

Polar - and grizzly bears are rather similar, opportunist omnivore mammals and the largest land carnivores. However the polar bear gave up hibernating, and is forced south by the warming climate, which causes the vital ice to melt, and allows grizzlies to expand north. So now their diets and hunting grounds overlap, with each-other and with humans - they even roam in towns. Life has grown even harder for polar bears, especially in summer.

The Sundarbans mangrove forest, in Bangladesh near the Indian border, is a tidal jungle where Ganges and Brahmaputra enter the Indian Ocean. Its has some 400 Bengal tigers - the largest population in the world, and the only to be hardly scared of men. The downside is tigers kill up the 50 Bangladeshis a year, even from neighboring villages, so keeping them inside the reserve is key to long-term survival. A recent project tries to train local mongrels, not pets but fiercely self-reliant dogs, to spot and even scare off tigers from villages. An individual tiger can turn...

Botswana's elephants are doing very well, too well perhaps. People are worried that too many elephants will damage their fragile desert home and have suggested that up to 60,000 should be culled. Researcher Mike Chase studies ancient elephant migration routes - he has tracked them across vast deserts, desolate salt pans, and Angolan minefields. Now he thinks he has a plan that could safeguard their future.

A Japanese biologist investigates why a single species of monkeys, who live in the icy high north of mountainous Hokkaido island, are treated so differently by people. In their natural habitat, their cheeky behavior and cleverly inventive self-teaching, such as taking warm baths in a sauna-effect, inspires awe and sympathy, even attracts tourists. Yet as their stressed habitat can hardly support the population any more, the farmers are merciless on their 'thieving' field raids.

Famous naturalist David Attenborough narrates the story of the Cassowary but also warns how the human expansion combined with climate change directly endangers this unique giant flightless bird as well as its habitat.

Wildlife film maker Rebecca Hosking investigates how to transform her family's farm in Devon into a low energy farm for the future, and discovers that nature holds the key. With her father close to retirement, Rebecca returns to her family's wildlife-friendly farm in Devon, to become the next generation to farm the land. But last year's high fuel prices were a wake-up call for Rebecca. Realising that all food production in the UK is completely dependent on abundant cheap fossil fuel, particularly oil, she sets out to discover just how secure this oil supply is. ...

The physical, ruthlessly guarded Iron Curtain between the free West and Soviet block was a nightmare for people, but a sanctuary for wildlife, some of which thrived nowhere else. After the fall of the Berlin wall, biologists research how birds, and other species, fared in the former no man's land, first in Germany, then further south.

British zoologist Mark Bower traveled to Peru to extensively study a rare monkey species in the Amazonian jungle: the mysterious uakari, about whom very little is known yet.