Although it doesn’t say on dododex, it does spawn on extinction(up so they can update it!)

IT'S ON EXTINCTION IN THE MASSIVE LAKE IN THE ICE AREA

Found on Extinction near the lake in the Snow biome.

They spawn near the river of green obelisk

When I first started ark acended I was horrible and just explored and this guy was my doom he kills you easily with his 3 crazy attacks be careful around him as he’ll randomly strike

Best spot I could find them in on the island is the western region of the swamp where there’s less trees and more water. Cords (69, 23)

I tried to knock out take it with a stick and saw 0 damage

They replace sarcos when spawing so be careful in chitin cave or you might run into the Jaws of a 150 big ol gater that. Also their tails a currently bugged in asa so just follow the black pillars that appear randomly

They are aggressive toward basically every other wild tame. They are very easily distracted. Be careful near them, they can turn and trap you under them so easily. This is also risky when taming.

They also have "hardened" and melee weapons are basically useless against them.