Narrator: If you're hiking pretty much anywhere in the US, this is one sound you don't want to hear... [Audio of rattlesnake rattle.] The warning of a rattlesnake. Now, just because a rattlesnake ...

Encountering a rattlesnake in Texas isn’t all that uncommon — but even the residents who have lived in the state for decades ...

In other species, for example, the Mojave rattlesnake, Crotalus scutulatus, the venom also has a strong neurotoxic effect ... make that buzzing sound as adults do. Rattlesnakes normally live ...