Page last updated at 10:51 GMT, Friday, 10 October 2008 11:51 UK

How to spot an alien ladybird

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The harlequin ladybird has rapidly spread since its introduction to the UK, scientists say.

Scientists believe that the species is having a dramatic impact on our native ladybirds.

Peter Brown, who organises the Harlequin Ladybird Survey, heads to a churchyard near Ely to explain how the alien species differs from the UK's native ladybirds.

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