I've looked and looked, and the only information offered is: at least 5 years. One site said 10.2 years had been documented as their 'in captivity' lifespan. And they all say that their full life span is unknown (other than being at least 5 years long) because they live such sheltered and secretive lives. Most salamander species seem to live for an average of 10 - 15 years, according to what I've read up on multiple sites and resources. Is ten years a fair number to expect for this species? Or should I take or add a few years?