The biological family that includes rattlesnakes, pit vipers, and moccasins—venomous snakes with heat-sensing pits and often distinctive rattling tails.
Modern Latin scientific name derived from crotalum (Latin for rattle), with the standardized family suffix -idae used in biological taxonomy.
This family has over 200 species spread across the Americas, Europe, and Asia, making it one of the largest venomous snake families—and they all share that ancient Greek word for rattle in their scientific name!
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