So, that's the story behind all the good birds/bad birds nonsense in old North American bird books!
http://www.nytimes.com/2012/05/22/s...about-bird-diets-may-be-lost.html?ref=science
http://www.nytimes.com/2012/05/22/s...about-bird-diets-may-be-lost.html?ref=science
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