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Dipper debut Channel: BBC Nature Length: 0 Date: February 16, 2011 Chris Watson goes in search of a sound that has eluded his microphones for 30 years.

Crash test dinosaurs Channel: BBC Nature Length: 0 Date: February 16, 2011 Dinosaur dummies show the force of a Triceratops charge as it hits a mighty T-rex.

Night fishing Channel: BBC Nature Length: 0 Date: February 16, 2011 Nocturnal tawny owls are caught fishing on camera for the first time.

Doubling the odds Channel: BBC Nature Length: 0 Date: February 16, 2011 Shared parenting allows pipefish to produce more young.

Moving majesty Channel: BBC Nature Length: 0 Date: February 16, 2011 A tiger’s roar sets an emotional tone for George McGavin's musings on the big cat's future.

Tantalising tigers Channel: BBC Nature Length: 0 Date: February 16, 2011 Bhutan’s rare tigers are caught on film for the first time.

Fantasy fish Channel: BBC Nature Length: 0 Date: February 16, 2011 Seahorses are like composite creatures, and a little too fascinating for their own good.

Tar pit evidence Channel: BBC Nature Length: 0 Date: February 16, 2011 Sabretooth bones show signs of injury and healing.

Running wild Channel: BBC Nature Length: 0 Date: February 16, 2011 Non-native sika deer have made a few pockets of Britain their home.

Sharp-toothed sharks Channel: BBC Nature Length: 0 Date: February 16, 2011 Steve Backshall looks into the mouths of some very large fish, with immensely sharp teeth.

Carnivore queens Channel: BBC Nature Length: 0 Date: February 16, 2011 Sheer weight of numbers give hyenas the upper hand against lions.

Pregnant pause Channel: BBC Nature Length: 0 Date: February 16, 2011 Heavily pregnant caribou struggle to keep cool on their summer migration.

Pride before a fall Channel: BBC Nature Length: 0 Date: February 16, 2011 Rival sabretooth males combine forces to challenge a pride male for control.

Red kite carers Channel: BBC Nature Length: 0 Date: February 16, 2011 Red kites have one of the longest fledging periods of any British bird.

Deer in the mist Channel: BBC Nature Length: 0 Date: February 16, 2011 Mike Dilger dmonstrates how best to watch highly nervous roe deer.

Sea crossing Channel: BBC Nature Length: 0 Date: February 16, 2011 An Ornithocheirus makes an epic journey across the young Atlantic Ocean.

Purring lemurs Channel: BBC Nature Length: 0 Date: February 16, 2011 Why ring-tailed lemurs are also known as cat lemurs.

Mothers on migration Channel: BBC Nature Length: 0 Date: February 16, 2011 Why do Canada’s pregnant caribou make their hazardous arctic journey?

Red kite flight Channel: BBC Nature Length: 0 Date: February 16, 2011 A slow-motion musical montage shows the red kite’s aerial grace.

Kite flying Channel: BBC Nature Length: 0 Date: February 16, 2011 Over a hundred red kites swoop down for some free farm fare.

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