Rattlers here in Nevada are not as noisy as they used to be. The theory is that all of the noisy ones were killed off and the ones left are not as willing or able to rattle. Also, there are Mojave Green’s they will literally pursue a human.
“Also, there are Mojave Green’s they will literally pursue a human.”
Yep!!! Them suckers are VERY aggressive, and half the time they will not rattle. I have been chased by them. Not far, but they DO come at ya! I stepped on one in the garden while wearing sandals. I jumped backwards and it bit the bottom of my sandal. It never rattled the whole time up until I took its head off with my snake gun (.410)