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"While this sort of spoon-and-washboard anatomy to produce sounds is well-known in insects - see stridulation -, it has never been documented before in vertebrates (some snakes stridulate too, but they do not have dedicated anatomical faetures for it)."
What about rattlesnakes?
190.77.117.1 (talk) 18:37, 20 February 2008 (UTC)