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Dialects common to humans and birds
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California, USA (Berkeley Daily Planet): Just as among human beings, dialects in bird species can be highly localized, with audible differences in sparrow populations only a few yards apart in the same patch of habitat. Males with territories on a dialect boundary can be bilingual. Getting the song right makes a big difference in their social lives, since females are more responsive to the local dialect. And genetic differences seem to mirror song differences.
For more information, please visit:
www.berkeleydaily.org/text/article.cfm?issue=04-05-05&storyID=21108
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