What an amazing array of sounds birds have to offer! The call of a male Yellow Rail sounds like someone tapping two small stones together. And Turkey Vultures hissing at one another over a carcass sound like a snarling lion. The duet between the male and female Barred Owls seen here is especially raucous. BirdNote gets most of its sounds from The Macaulay Library of Natural Sounds.

More info and transcript at BirdNote.org. 

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