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Crayfish Invasion
Crayfish Invasion: Chris visits a stream which has been taken over by signal crayfish
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Winterwatch 2015 Highlights
Clips and exclusives from Winterwatch 2015 - live in the Cairngorms
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A day in the life of Lucy Lapwing
Duration: 02:22
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The search for wildlife at RSPB Arne
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Have you heard of fern sperm?
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Iolo Williams spots his all time favourite bird
Duration: 02:34
