use C and left click Immediately to tree，you can get thatch.
Therizinosaurus
The Therizinosaurus (or "Tickle Chicken") is a swift, clawed herbivore prized for its versatility. Its specialized strikes make it an exceptional resource gatherer, while its strength makes it a powerful combat mount.
How ARK players tame and knock out the Therizinosaurus: what to feed it, what to knock it out with, and how to keep it safe.