To the person asking how to use its climb on console, ah, great question, i am very edumacated in this topic. So, if it hasnt changed, if you jump towards a surface, the deino will latch on. From there, look up and jump again, and it will go up, aslong as your deino actually works, mine has been a bit bugged lately.
Tame them by getting their eggs. Use a whip while you're grappled to a flyer. They need five fireplaces to hatch. It doesn't take that long for them to grow, but to hatch them it's thirty minutes. They can be found easily on the white cliffs along with their eggs. I don't care if you like this or not I just wanna give tips.
These things are amazing for fighting the Dragon boss due to the fact that the dragon can't hit these guys AND they do the bleed effect which stacks. If you can get these, I'd recommend doing so and pumping health.