TAMING TIP(for my fellow mobile people): I tend to find them hanging around the outside of the obelisks. If you have a flying creature, (which I assume you would if you were trying to tame a theri) then hit it once and stay close to the ground, lead it towards the obelisk until it yeets itself into the ditch. BOOM theri will be there whenever you want to tame it, there’s perfect places to build traps, and a bunch of high-ground areas. Up this if it was helpful