Remember: On Mobile SP, if you’ve found one of these and don’t want it to despawn, avoid (some) cave diving! Specifically, I’ve found that cave diving in The Middle Chamber COMPLETELY resets every spawn on the Island (like the destroywilddinos command on PC), but the Cave in the South and the Northwest Cave are safe (those two won’t reset the spawns). Not sure about the other caves, though. But better safe than sorry!

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