With 2 current threads about rattlesnakes, here's an article I found very interesting, about how variable the venom can be for the SAME species of rattlesnake,
found in nature just 2 hours apart in differing habitats...and some speculation as to the reason they have evolved this way.
https://www.nationalgeographic.com/s...ferent-venoms/
BTW, I'm a former resident of Southern California who has been to these places, but fortunately with no bites.