| 1. | Threatened species present here include whooper swan and Special Area of Conservation.
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| 2. | Significant species wintering here include mute swan, whooper swan and tundra swan.
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| 3. | At the river mouth species of birds include mute and whooper swans occur.
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| 4. | It is a habitat for whooper swans, moorhens and little grebes.
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| 5. | Trumpeter swans have similar calls to whooper swans and Bewick's swans.
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| 6. | He described Bewick's swan in 1830, distinguishing it from the larger whooper swan.
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| 7. | Whooper swans have a deep honking call and, despite their size, are powerful fliers.
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| 8. | Whooper swans still winter on the lake " . ( ON is Old Norse ).
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| 9. | The rivers running through the moor make home for many wildlife, including wintering whooper swans.
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| 10. | Whooper swans have also been known to breed here.
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