Here's an article of interest to all who record or listen to bird song. City dwelling birds may be speaking a different language than their country cousins to compensate for human noise pollution.
From the BBC...
http://news.bbc.co.uk/2/hi/uk_news/wales/mid_/8079539.stm
Added by Gina Farr on June 10, 2009 at 3:30pm —
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