"Formerly rare beak deformities are spreading rapidly among crows in southwestern B.C. and Puget Sound, according to researchers from the U.S. Geological Survey.
The biologists observed an unusual concentration of crows with badly overgrown beaks in Alaska beginning a little over 10 years ago. According to the scientists, a capture program in 2007 and 2008 revealed that more than 16 per cent of the Alaskan crow population was afflicted, 'the highest rate of gross deformities ever recorded in a wild bird population.'"
Randy Shore reports for the Vancouver Sun December 24, 2010.
Source: Vancouver Sun, 12/24/2010
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