Birds may be able to distinguish different 'voices' in each other's calls, giving rise to cooperative behaviour between non-related individuals, a researcher has suggested.
Source: http://www.cosmosmagazine.com/news/5193/birds-use-different-voices-team
Ana Beatriz Barros Ana Hickmann Ana Ivanovi Ana Paula Lemes Ananda Lewis Angela Marcello Angelina Jolie Anna Faris Anna Friel Anna Kournikova
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