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Re: North Western Hot snake vs Non-venomous snakes?
Oh and my comment on the eye thing: I believe slit pupils only mean that the animal is nocturnal, and round pupils mean diurnal. Look at boas and pythons, they both have vertical pupils like a rattlesnake does. Since most other snakes in your area are colubrids (which are, for the most part, diurnal) the eye thing may hold true, but I would NOT trust it as a sole means of identification. You would have to get uncomfortably close to a rattler to look at its eyes.
The same trait transfers over to mammals, cats (nocturnal) have slit pupils and dogs (diurnal) have round pupils.
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