Ban'thalos

Ban'thalos is a large ghost owl spirit beast who soars Mount Hyjal's skies. He is also the first spirit beast to have the look of an owl. He is also one of the biggest spirit beasts, mostly due to his large wings.

Taming Challenge tactics
The challenge in taming Ban'thalos is aggroing him from his extreme altitude and surviving the fall and the moonfire damage while you descend. Disengage has been suggested. Engineers can use their Flexweave Underlay.

If all else fails, use a Colossal Parachute (but be quick, the item will disappear from your bags 20 minutes after purchase from the vendor in Feralas).