If you are going to tame one of these with no dinos, be sure to upgrade your movement speed and get tranqs. When you see it whip its tail forwards move to the right you will dodge the shots. This worked for me.
A good thing to do for a lot of creatures is build a cage out of door frames and ramps once the creature is in just shoot it with tranq arrows or darts but the creature has to be big enough to not walk through the door frame
If you have a wyvern or argy, easiest way I found to tame is to set up a taming pen, 2x4 with single door frames on the first level, walls on the second(stone), with a Dino gate on one end. Go pick up your dragon of choice and drop it in! Super easy and quick.
We picked him up with a crystal wyvern and I shoot him from the ground with tranq darts. It was easy. Just be sure you are standing behind them (crystal wyver thorny combo), or the thorny can hit you with his stings.
To knock out this creature you can use a flying creature to reach a tall stone or hill that it won't be able to climb then shot it with your tranqs, if and when it suits spikes at you move back slightly to dodge them. Good luck.