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5/5 Brett Westwood listens out for birds which you are likely to see or hear near rivers.
BBC Radio 4
4/5 Identifying Rails, including coot and moorhen, as well as a bird which squeals like a pig.
3/5 Identifying reed bed songsters, including the reed and sedge warblers.
BBC Radio 4 FM
2/5 Brett Westwood and Stephen Moss find out how to distinguish one duck from another.