5 Things You Thought You Knew -- But Didn't -- About Rattlesnakes | KQED
Rattlesnakes change their rattle frequency based on nearby threats | CNN
Prairie Rattlesnakes (U.S. National Park Service)
Rattlesnake | San Diego Zoo Wildlife Explorers
Why does a rattlesnake rattle? I know that it is used as a warning for intruders, but wouldn't that just alert the snake's prey, making it harder to hunt? - Quora
I wonder if anyone can model this to 3D print. It would rattle just like a rattlesnake rattle (whole of course). : r/3Dprinting
Tail rattle hi-res stock photography and images - Alamy