I don't know why the guy saying they're not affected by Bolas is at the top. I just hit a level 5 wild in the mountain area with a bola right in the legs and it froze in place perfectly, no issues. BOLAS WORK, BUT YOU HAVE TO HIT THE LEGS, THE THIN SKITTERY EASY TO MISS LEGS.
Bola it, shoot it in the head with tranq darts, feed it spoiled meat! A very effective and easy tame. Be careful though, they're hard to see in grassy areas. I was taming a sabertooth once when it came up out of nowhere, I went unconscious before I could even run away. It took me 5 tries to get my stuff back from my dead body because the scorpian was always there. In the end, surpinsgly, my sabertooth survived the taming process and I ended up taming the scorpian right after!
In scorched earth don't bother using a Bola, the boomerang is incredibly effective at knocking them out, and it only takes 3 to 4 hits or maybe less depending on the level. The boomerang also bounces back to you faster if your just nailing it in the face. Aside from being a well rounded creature, in scorched earth they are found almost everywhere so its easy to tame a bunch and farm them for chitin so you can make cementing paste because unfortunately scorched earth has no frogs or beavers so you need to either hunt jug bugs to extinction, or farm livestock.