The mole salamanders are part of the genus "Ambystoma". There are a group of animals that live in North America. The only family in this genus is the Ambystomatidae. The Axolotl ("Ambystoma mexicanum") is a popular exotic pet. They are also used in research. The Tiger Salamander ("Ambystoma tigrinum") is an official amphibian of many US states. They are also sold as pets.