There really is such a thing as a rattleless rattlesnake—it is called the Santa Catalina rattlesnake, and it’s found only on the island of Santa Catalina. Commonly, rattlesnakes use their rattles to warn away animals that are too big for them to eat. Scientists think that over time, this snake lost its rattle because there are no hoofed animals on the island that it would need to warn away.
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