Dating is the best way to tame these. The appropriate dress for the occasion is a full suit of Ghille Armor. Pick your ape date up with a Quetz, drop in a taming pen, and hand-feed Mejo Berries. He/she will love you for it!
Easy to tame, just sneak and bring one soothing balm and berries but i prefer mejoberries. If your looking for one of these go to the redwood forests and you might find one just search for it, but becareful the terror birds might attack you or purlovias the sneaky rat. (Up if this is helpful)