Me too!...
I do alot of observation in regards to what snakes do as well(forty years worth), and I often wonder what the heck is going on in their little heads!LOL
We both know that most of it is just pure instinct, but sometimes(like you) I see stuff happening that is so unique to one snake, and wonder WHY it is so different than most of the others, and what drives it to do things that are so out of character.....like a Scarlet King I once had that would charge up to the top of the cage when it noticed the lid was coming off the container, to literally "snatch" a pinky from my hand!!
That happens ALL the time with other species/ssp., but not Scarlets!. Or certain Honduran hatchlings that don't seem to mind handling at ALL, while others simply go "bonkers"!!....no matter what!.....of course the WAY they are held has a GREAT amount to do with that, and I consider myself pretty good at
"reading" and anticipating their reactions more than most folks.
Or on another note, the theory that many rattlesnake's natural reaction to rattle has been a disadvantage in places that are heavily populated with human activity, and only gives their presence away so they are more likely to be killed. Thus leading to them to being less abundant than the quieter ones, due to the louder animal's gene pool being depleted by being more apt to being killed by folks. Just the other day I was at a serpentarium, and was looking at animals behind the glass. Most were rather placid from being used to seeing human activity, while certain others would not stop rattling at all even when I held perfectly still for several minutes !
Surely it would also depend on when those animals where placed in those surroundings, meaning they might have only been there a very little while, and where very nervous with the new surroundings and all. That would all play a VERY key role in the way they behaved and reacted to things too.
Anyway, I liked your post on the easy going Rattlesnake(along with many others).
That's NOT to say that if someone walked up to little dude, he wouldn't take the opportunity to bite them right square in the ass either though!!LOL
In any case, I'm done rambling!
best regards, ~Doug
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"Better to be silent and thought a fool, than to open mouth and remove any doubt!"