Box Turtles, which are semi-aquatic, are also tricky to keep in captivity. Note also that some aquatic turtles, such as Map Turtles, are also very sensitive to water quality. The fact is that baby tortoises or small terrapins look cute, but they do need a lot of reading and planning before you buy one. See our Chelonian pages. Crocodilians, Tuatara and Amphisbaenians and Caecilians Just for completeness, a note on the remaining herps.
Crocodilians are far too dangerous, too restricted or too demanding for all but zoos or experts.
The tuatara is in danger of extinction and may only be kept, if at all, by accredited zoos. I would not recommend them until more is learnt about them. If any of the above sounds somewhat tough, that is because I want to outline any drawbacks or difficulties to keeping herps as pets. Also please remember that, like a dog at Christmas, any sort of pet is for life. If you find that you have taken on something unwisely, or your circumstances have changed, then you have a responsibility to your pet to find a new home for it with someone who can look after it, or at least find an animal shelter that can take it.