OK, I have to come clean and admit I don't think it was an Ivorybill I heard yesterday in Newtonhill. It was the brakes of the papergirl's bicycle. But, as noted here, the frequencies on the sonagrams don't match exactly anyway, so it wouldn't fool the professional sound guys and gals. So whatever is making all those noises in Florida, we have eliminated the possibility that it was our papergirl's bike. In such incremental steps, science and knowledge move on.
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