Marie Read / Mallard (Anas platyrhynchos) male performing "Grunt-Whistle" courtship display, in which he tosses an arc of water droplets into the air while giving a grunting call followed by a sharp whistle, Orang...
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Marie Read / Mallard (Anas platyrhynchos) male performing "Grunt-Whistle" courtship display, in which he tosses an arc of water droplets into the air while giving a grunting call followed by a sharp whistle, note...
