For 70 years, the population of the wapiti deer in the Yellowstone National Park in the United States increased unchecked. Without natural predators and despite all human attempts to check the increase of the deer population they kept spreading and destroyed vast regions of the park's vegetation. They literally defoliated the National Park. However, a well-directed reintroduction of 41 wolves between 1995 and 1997 worked wonders: The animals restored the natural balance in the National Park.

See the great migration as never before! The Mara River, nature’s best laid trap for migratory animals, is the stage for a grandiose spectacle.  When food supply in the Serengeti dwindles, the Masai Mara is a paradise for predators. As the black wildebeests, gazelles, zebras and antelopes make their yearly trip from the south of the Serengeti to the north, nature’s best laid trap, the Mara River in Kenya is waiting ahead. Captivating shots filmed under water show how crocodiles prepare for the Big Hunt while other predators lurk on the banks awaiting their bounty.

The Life of the Rabbit is a short but charming informational piece on the habits, traits and lifecycle of the humble rabbit. The film follows both 'real' and animated creatures, depicting a range of activities from daily grooming to the traversing of tunnels and dens, sometimes at exceptionally high speed, whilst being pursued by a rogue pole cat with a desire for a rabbit dinner.

Every year, thousands of Antarctica's emperor penguins make an astonishing journey to breed their young. They walk, marching day and night in single file 70 miles into the darkest, driest and coldest continent on Earth.  This amazing, true-life tale is touched with humour and alive with thrills. Breathtaking photography captures the transcendent beauty and staggering drama of devoted parent penguins who, in the fierce polar winter, take turns guarding their egg and trekking to the ocean in search of food. Predators hunt them, storms lash them. But the safety of their adorable chicks makes it all worthwhile. So follow the leader... to adventure!!

BBC The Natural World.  In 2004, a team from the Planet Earth series captured the first ever film of a wild snow leopard in the mountains of Pakistan. For Nisar Malik, who led the expedition, these images sparked a passion that compelled him to return. With cameraman Mark Smith, he spent two years documenting the snow leopard's daily life, finally lifting the veil on the most elusive of all cats.

"Hunted by Moonlight" is the second film of Dinosauria Volume 2, and the seventh of the Dinosauria Animated Series overall.

A look at the state of the global environment including visionary and practical solutions for restoring the planet's ecosystems. Featuring ongoing dialogues of experts from all over the world, including former Soviet Prime Minister Mikhail Gorbachev, renowned scientist Stephen Hawking, former head of the CIA R. James Woolse

Humans belong to a group called anthropoids. Gibbons have the most human-like traits among the anthropoids. Gibbons are the only apes capable to sing like humans and communicate through their songs. This film documents an unprecedented attempt to investigate the musicality of multiple species of wild gibbons - siamang, the white-handed gibbon and the javan gibbon - surviving in the South-East Asians habitats. The story of endangered Asian Ape unfolds in this documentary with their songs in various situations.