So like people have said they are really glitchy and you cant hit them when they are on trees but heres how you tame one

Step 1: find the one you want

Step 2: stalk it until it drops to the ground

Step 3: HAVE A BOLA try to run to it and hit it with a bola as fast as you can

Step 4: (rifle recommended) shoot it in the head with a tranq dart (head has 3x)

Feed and tame :D