"A rattlesnake's rattle is built up over time as it sheds its skin and it shakes its rattle using tiny muscles on the sides of its tail. This is fascinating-unless you hear the deadly rattle yourself! The rattle is a warning that a venomous snake is nearby. Readers learn all about rattles and much more about rattlesnake bodies in this book. Additionally, the achievable main content includes information about rattlesnake life cycles, habitats, and prey. Engaging text meets brilliant color photographs to provide a thrilling reading experience for readers." -- Provided by publisher.