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Blue Tits and Ultraviolet Light

Why European Blue Tits could be called ultra violet tits. Also, the haunting call of the Great Northern Diver (Common Loon), recorded by John Pattison. Finally, how the British Mountaineering Council is helping to save the Morocco's Bald Ibis from extinction.

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14 minutes

成人论坛 World Service Archive

This programme was restored as part of the World Service archive project