Yes, pit vipers do have rattles. Baby rattlesnakes don't have rattles of their own (ironically), but grow them section by section over time. Needless to say, it was a baby rattler. 5 Things to Know About Rattlesnakes and Their Babies. Despite their impish size, baby snakes have enough venom to be very dangerous if they bite a human. Asked in Animal Life Do pit vipers have rattles? Rattlesnakes have 'rattles' that are shaken and produce a baby rattle sound. The rattles are made of hollow beads which are actually modified scales from the tip of their tale. Crotalus mitchelli (sub sp under investigation) He rattles his little button but there is no sound…born last aug/sept…and he has not yet struck at me. It didn't have rattles but it's tail was vibrating. I have heard for every year they get a new rattle almost like the rings of a tree. I hope this helps you. I wasn't sure what it was until I looked close. I’ve handled a lot of snakes and have always moved snakes out of the road so they don’t get squished. I was doing that when a baby snake lunged at me. Speckled rattlesnake with “silent” rattling tail. I was really lucky not to have been bit. 4 | Adult rattlesnakes do not always rattle an audible warning before or while they are biting.