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Real estate Channel: BBC Nature Length: 0 Date: February 16, 2011 Owls struggle to retain their territorial investments.

Damsels and dragons Channel: BBC Nature Length: 0 Date: February 16, 2011 Dragonflies and damselflies are one of the most ancient life forms on land.

Lekking at dawn Channel: BBC Nature Length: 0 Date: February 16, 2011 Iolo Williams gets up at dawn to watch a remarkable black grouse lek near Llangollen, in North Wales.

Fighting dance Channel: BBC Nature Length: 0 Date: February 16, 2011 Male black grouse scuffle over their display grounds.

Gentle gulls Channel: BBC Nature Length: 0 Date: February 16, 2011 Kittiwakes are the doves of the gull world and give gulls a good name.

Swallow the truth Channel: BBC Nature Length: 0 Date: February 16, 2011 The shocking truth behind a much-loved bird is revealed on camera.

More than a job Channel: BBC Nature Length: 0 Date: February 16, 2011 Life as a live in warden at the tern colony on the Skerries.

Crayfish whisperer Channel: BBC Nature Length: 0 Date: February 16, 2011 A lucky dip for Bill Oddie as he nets a female crayfish.

Queen of the kingfishers Channel: BBC Nature Length: 0 Date: February 16, 2011 Two females engage in a battle to the death in defence of mate and territory.

Fish development Channel: BBC Nature Length: 0 Date: February 16, 2011 Jaws were a significant development in the evolution of fish.

Unsophisticated relatives Channel: BBC Nature Length: 0 Date: February 16, 2011 All backboned animals, even humans, are descended from sea squirts and slimy hagfish.

Rabbit eviction Channel: BBC Nature Length: 0 Date: February 16, 2011 Skomer’s native puffins boot rabbits out of their five star burrows.

Bear introductions Channel: BBC Nature Length: 0 Date: February 16, 2011 Scientist Lynn Rogers introduces Gordon Buchanan to Lily and her cub Hope.

All at sea Channel: BBC Nature Length: 0 Date: February 16, 2011 Bill Oddie reluctantly takes to a boat in search of St Kilda’s puffins.

Black caiman catch Channel: BBC Nature Length: 0 Date: February 16, 2011 Steve Backshall catches up with a young caiman hiding out in the reeds and rushes.

Kidnapped calf Channel: BBC Nature Length: 0 Date: February 16, 2011 Echo sends in the herd heavies to retrieve Ebony.

The sex life of ducks Channel: BBC Nature Length: 0 Date: February 16, 2011 Male ducks expend all their autumn energy in impressing the ladies.

Ice-age Americans Channel: BBC Nature Length: 0 Date: February 16, 2011 Tar pits reveal evidence of huge mastodons and two-tonne, armour-plated sloths.

Something fishy Channel: BBC Nature Length: 0 Date: February 16, 2011 Chris Packham dons a fetching wetsuit to meet the fish in the River Wensum.

Monitoring male bears Channel: BBC Nature Length: 0 Date: February 16, 2011 Huge male black bears turn up for close inspection at the research institute.

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