"Modern farming in Europe has reduced the numbers of 24 common bird species by a third in a quarter of a century, a report by European ornithologists says. The authors include staff of the UK's Royal Society for the Protection of Birds, and of BirdLife International.
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The indicator shows that across Europe, from Spain to Poland (including the UK), the species' numbers, including skylarks, lapwings and yellowhammers, have crashed by a third since 1980, and says this is because of intensive farming.
The RSPB says: "These declines have been severest in countries in north-west Europe. In the UK, for example, between 1970 and 1999, the skylark declined by 52%, the yellowhammer by 53% and the corn bunting by 88%."
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It (ed. - the RSPB) says: "Birds at most immediate risk are those particularly vulnerable to intensive agriculture, such as the corncrake, the red-backed shrike and the great bustard. Currently, eastern European states have significant populations of these birds."
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http://news.bbc.co.uk/1/hi/sci/tech/3403505.stm