Use of pesticides and fertilisers identified as most significant factor behind loss of 550 million birds from skies
The use of pesticides and fertilisers in intensive agriculture is the biggest cause of the dwindling number of birds in the UK and the rest of Europe, scientists have said.
Compared with a generation ago, 550 million fewer birds fly over the continent, with their decline well documented. But until now the relative importance of various pressures on bird populations was not known.
