Taricha torosa, California newt. Other species of Taricha also have tetrodotoxin. As far as I know their range is restricted to the pacific northwest.

tetrodotoxin scares the crap out of me. Ive been catching/handling/releasing california newts in a local pond for years (gently, with clean wet hands). One day I looked them up, turns out they are LOADED with tetrodotoxin due to an evolutionary arms race with a type of garter snake that eats them.