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Why ducks don't freeze in winter
With waterproofed feathers and clever blood circulation - ducks can endure the cold.
Duration:
This clip is from
More clips from Episode 3
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The best of our winter wildlife on day three
Duration: 02:05
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Drama at the grey seal colony
Duration: 05:33
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The waterfowl of Walthamstow Wetlands
Duration: 04:51
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The winter flower that provides for bumblebees
Duration: 05:10
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The search for the elusive bittern
Duration: 06:35
