Certain Cobras 'seem' to protect their young for a short time....they certainly guard their eggs fiercely. I have experienced this first hand.

Rhea, Rattlers don't lay eggs, they're live-bearing.

I think (but don't really know) that young Rattlers may remain around the mother for protection, but this is merely a bi-product of the mother protecting herself, rather than any kind of maternal (or pedagogical, excellent word, Rich) instinct.