BirdLife International Posted March 3, 2017 Share Posted March 3, 2017 Trills and chirps, songs of love and warning shrieks, whistles through the wind in mid-flight – but why do birds sing? We decode the secret language of birds. Read more: http://feedproxy.google.com/~r/BirdLife-news-posts-blogs/~3/Zkxdp47MtII/why-do-birds-sing Link to comment Share on other sites More sharing options...
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