A decline in the greenfinch population  has been blamed on an infectious disease.

The British Trust for Ornithology says trichomonosis is also taking a toll on the chaffinch population, but bird lovers can help combat its spread by keeping bird feeders and tables clean.

For the full story, click the following link to access the short video clip on the BBC News website:

http://www.bbc.co.uk/news/uk-england-11037830

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