🔊 Sound on! 🔊 That's a rattle, but not a rattlesnake. Bullsnakes will make a rattling noise when they want you to back off - but they have no actual rattle. They're also one of the few snakes that actually hiss. And unlike rattlesnakes, they are not venomous. If you see a bullsnake, give it respect and space! | Iowa Department of Natural Resources