Rattlesnake Rattles Are Made of Interlocking Hollow Keratin Rings

Each time a rattlesnake sheds its skin, a new hollow keratin segment is added to the rattle. The segments interlock but are not attached, so they knock together to produce the distinctive sound. A new snake grows one segment per shed.

Source

https://en.wikipedia.org/wiki/Rattle_(rattlesnake)

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Published: April 2, 2026
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Snake Animals Biology Science

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