If you start in the south zone there might be a chance one

Will spawn in the forest or in the swamp then lure it to a safe place make sure to grab 150 berries (any type) and feed it circle it while feeding it the berries and you tamed a diplodocus this guy is a beginner sauropod perfect for level 20s the saddle unlocks in level 32 and you can switch seats while attacking or just play multiplayer and get 10 tribe members to sit on the passenger seats with shotguns or crossbows hope this was helpful😊😊