I would usually find some in survival evolved. Over by the green obelisk by the swamp part of it. There would usually be 3. Bring something to protect you because I just picked it up with a argent and take it some where safe. The next spot is by the redwoods but by the volcano fly to the other mountain where you'll see wet ground that looks black and there will be brontosaurus and there will be 3 but beware of raptors, carnos. And rexes.
Put this higher !!So if you play mobile I found 3 in the same spot okay so first do the volcano pursuit the one where it's the cave inside the pursuit should be south of the equator and in that general area if you look around you'll find them