The Rattlesnakes are venomous reptiles native to the Americas. She is named for her rattle: a structure formed of interlocking segments of keratin. By contracting her muscles, she can cause these structures to vibrate against each other, the sound amplified by their hollow interior. This acts as a warning system to predators that might disturb her as she rests. Although her bite can cause swelling, pain, hermorrhaging and heart failture, Rattlesnakes only attack if provoked - and many more Rattlesnakes die by human hands than humans by a Rattlesnake's fangs (about 5 of the latter per year).
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