'Worrying declines' for UK species
23 May 2013 Last updated at 09:21 BST
A major new report from 25 wildlife organisations, assessing the state of Britain's Nature, is warning that many species of wildlife are facing extinction in the UK unless urgent action is taken.
It looked at more than 3,000 native species, 60 percent of which were found to be in long-term decline.
The BBC's Science Editor David Shukman reports.