Wiggles, the Children's Python

[Bogertophis]

All snakes, but it's an old book (2007). It wouldn't surprise me, if more recent scholarship found some species can see color. But if a world renown herpetologist thought that snakes can see neither shape nor color, it stands to reason that they see very differently than we do. So, we shouldn't be surprised when they fail to recognize us visually.

Also, there's no reason to think that all 3000+ species of snakes that differ widely in their methods of survival are all going to have the same sort of visual ability. I think it's more likely that active diurnal hunters will have superior vision to nocturnal ambush-predators, but I don't don't know that for a fact, only that it seems that way to me, from what I've kept.