To get this mount, you have to finish next questline with your Snowfeather Hatchling:
1. Level the hatchling to 25.
2. Take your falcosaur hatchling to Orgrimar|Stormwind.
3. Defeat 3 Northern Hawk Owls using your hatchling in fightingteam.
4. Complete 5 World Quests with the hatchling summoned out in Hightmountain.
5. Start and complete 3 Pet Battle WQs with the hatchling as primary pet and summoned out.
6. Complete 1 Rare Elite WQ with the hatchling summoned out.
7. Defeat 3 specific wild pets using your hatchling. (different ones than #3)
8. Complete 3 PVP WQs with hatchling summoned out.
9. Buy an item from Dalaran for the hatchling. As reward you’ll get Tiny Pack
10. Defeat 3 Mudshel Сonch using the hatchling plus 2 pets of a specific pet family.
11. Defeat boss with the hatchling summoned out (any mode).
12. Defeat 3 specific wild pets using the hatchling plus 2 Undead pets.
13. Defeat a Ursoc with you hatchling
14. Defeat 3 coralback fiddlers using the hatchling plus 2 Elemental pets.
15. Bring your Hatchling back to Nest.