The Shelduck of Spurn
Each summer 100,000 British and Baltic shelducks head for the Heligoland Bight simply to shed wing feathers and grow new ones. But why do they go on this moult migration?
Presented by Michael Clegg BBCBristol
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The Shelduck of Spurn
Each summer 100,000 British and Baltic shelducks head for the Heligoland Bight simply to shed wing feathers and grow new ones. But why do they go on this moult migration?
Presented by Michael Clegg BBCBristol