A Song for May 18

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Click the sonogram to hear and see the sound.

From the free-wheeling, but still disciplined, warbles of the Warbling Vireo and the Siberian Rubythroat we come now to a paragon of order, the Black-throated Sparrow. Neat blocks of song march across the frequency-time continuum instead of wriggling across it like a snake. Two very distinct song-types alternate faithfully. Each song-type follows its own rules of assembly faithfully. It is all very neat, just as the bird is neat, a natty combination of black on white against a backdrop of gray.

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