Can be tamed.

Level:45 Elite
Name:Retains original name after taming.
Requires Feathermane Taming.Required Skill: Feathermane Taming
You must learn a special skill to tame Feathermanes. It is taught by a Tome of the Hybrid Beast. See our guide for the pre-requisite achievements.
Location & Notes:

Located in Azsuna. Netherbeak flies in an erratic, high-altitude path around a wide swathe of Azsuna. It is stealthed and is only detectable by Track Hidden once it gets close. A good place to wait is to hover a distance above the temple on Rhut'van Peak. Netherbeak should eventually fly by and aggro to you. Then land on top of the building and tame away!