I was wondering why it wasn't landing on my shoulder even with a regular torch equipped like the comment suggested. I finally realised that it was because I haven't bought the DLC they are in. So yeah you have to pay if you want one of these.

I’ve also seen them spawn on extinction, even though it shows that they do not spawn there I have seen it

It is NOT a knockout tame. Use a torch to lure it in, then do whatever it says (just know it's XP related, like crafting, killing, etc) after you fill the bar up, you feed it using the last slot of your inventory (duh) keep repeating this and it will soon tame! Have fun, don't die!

Go out with the scanner to find the direct links and then whip out your torch when you get close and it'll land on your shoulder. Then it'll indicate what it wants you to do for experience either kill something craft something or harvest something. I found harvesting with a ascendant pic on wood to get thatch is very good XP and goes quick. I carry and ascendant shotgun for when it wants me to kill something. The shotgun works great because it's very fast and powerful. As far as the crafting goes carry the materials with you to make standing torches. Excellent XP and not too heavy to carry you can just throw away the torches that you make. Follow these tips and you'll have many many drakelings.

While taming it, don’t hop on a mount or go in the water. This will make it hop off your shoulder and interrupt the taming process.

For those of you that have the reusable things like torch and bola. You CANNOT use the reusable torch for taming. It only works with a regular primitive torch.

Morter & pestles are perfect for taming these they max out the bar in one craft. Carry a stack of hide, harvest stone during the gathering phase and craft morters during the crafting phase.

Equip a torch it will land on you and give you tasks complete

The spring drakeling requested you earn exp by doing tasks

Crafting

Harvesting

Or killing dinosaurs

You have 2 mins to complete the task then you feed it meat and repeat till tamed.

Approach with a torch out and it will land on your shoulder. It will then require you to gain a certain type of XP. So far I've come across crafting, harvesting and killing as requests. Once your XP fills the bar to 100 you can feed it exceptional kibble from the last slot of your hotbar. Rinse and repeat until tamed.