When you find a dino you want to tame thats on foot you can make a u shape out of cages. You place one cage then open it then place the next. After uve made a u shape shoot the dino and have one cage closed. Run through the opening turn around and you can continue to knock out the dino. Best done close to a cliff you can then completely encircle the tame in cages and not waste recourses to do it because you can pick the cages back up. Small dinos that agro wont be able to get to the tame but rexes can.
1. Get tranq arrows and a crossbow
2. Find an anky of your desire
3. Shoot it in the head while walking backwards (they're slow so you can just walk while shooting)
4. When it runs away chase after it and shoot it
5. It'll be knocked out.
6. Feed it recommend food and any narcos if needed.
They get about 3x more metal than you! And depending on the level they can easily kill Raptors and other small predators.
They're found almost everywhere
Beaches, highlands, chalk hills, green forest, I've even see some near desert.