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Page last updated at 06:36 GMT, Tuesday, 30 June 2009 07:36 UK

Should you squash the Harlequin?


The Harlequin ladybird is putting over 1,000 species in the UK in peril, scientists have warned. Dr Helen Roy, of the Centre for Ecology and Hydrology, discusses the danger of the "dramatic and unprecedented spread of the top predator".

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