Saturday, June 8, 2013 at 8:58 am Some believe the song of the Wood Thrush to be the most beautiful bird song in North America. Others select the song of the Hermit Thrush. Still others name the singing of the Swainson’s Thrush. How do thrushes like this Veery create such fine music? The answer is that the birds have a double voice box, unique to them, called the syrinx. A fine singer like a thrush can voice notes independently and simultaneously from each half of its syrinx, notes which blend brilliantly as ethereal, harmonious tones.
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