Can a newt salamander and two leopard geckos live in the same tank?

Leopard geckos are compatible with a female housed with another female. Generally, they will mind one anothers company and not bother one another. In some cases, females will show dominance and could nip or bite a tank mate. So be sure to monitor their terrarium to ensure no bullying is taking place. A male cannot be housed with another male because once they reach maturity, males will show aggressive tendencies to prove who is dominant. This can ultimately lead to infection or even death. Males do great with multiple females if your expecting to breed.