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.

Completely irrelevant but I think it looks kinda cute.

Plant species Y, hide behind big rocks, shocking tranq, feed regular kibble. Done.

Go on a cliff and boomerang from above if low level.

Argent can pick it up now after tlc 2

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 stand on a big rock and use anything that knocks it out. And also watch out for the thorns

Be sure and name your first Thorny Dragon "Me So Thorny." Epic.

Best at gathering wood and thatch and knocking creatures with a handy Smithy