Red-bellied newts are one of my favorite critters up here on the mountain, and they are only found here in Northern California.
In the summer, you'll see them down in the creek, which is where they lay their eggs. In the winter, they are frequently underfoot on the driveway and hiking paths. They don't move very fast, so we keep a keen eye out for them so as not to accidentally injure one.
They can live for up to 30 years, are filled with neurotoxin that keeps them safe from predators, and like many other amphibians have the ability to regrow injured body parts like their eyes or feet, even their spinal cords.