What is a snake thinking?
Not doing anything. Simply exists, at length.
A snake at rest is not bored, it is solvent. Ectotherms run on a fraction of the energy a mammal of the same size burns, so a large snake can go weeks between meals and spend almost all of that time perfectly still.
The stillness is also hunting. Ambush species hold position for hours because moving costs energy and gives away the position - doing nothing is the strategy, not the absence of one.
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