A new genetic family tree of the UK's birds may help predict which will see their populations decline in future.The family tree - or phylogenetic map - shows how closely species are related.
The scientist who compiled it, Gavin Thomas, found that populations of closely related species tend to undergo declines more or less in step.
Writing in the Royal Society's journal Proceedings B, he suggests that an apparently healthy species may be at risk if its relatives are disappearing.
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