They do notice changes. First time I had a major viv cleanup and rearanged husbandry Naga had a 2-3 day period of more of hiding than usual, like a shorter "first acclimation" time. I left 1 hide unchanged to give him more security, and always do.
On later cleaning rearangements he has not shown hiding period again, but he explores a lot for a week or more: looks in all his hides and has to figure out which one he likes best this time.
Quite interesting they are, snakes.
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