The guy that said that they can be found in places other than chalk hills and at “green spire.” It took me like a half an hour of research to find what you were talking about. It’s not called a “spire” it’s an obelisk.
I was sitting on a flyer on a cliff above the deinos, thought I was safe to wait for my moment to steal their eggs...had the biggest heart attack when one of them decided to climb up the cliff. I accidentally dismounted in shock and fell right into the packs claws, where they shredded me to death. Don't be scared of them, they smell it.