This quest was marked obsolete by Blizzard and cannot be obtained or completed.Seek out Morthis Whisperwing at the Cenarion Refuge in Zangarmarsh.
Before all of the druidic orders coalesced into the Cenarion Circle, the Druids of the Talon were responsible for teaching promising young druids the mysteries of flight. With the dissolution of the order, former members teach the skill sparingly.
Even now, Morthis Whisperwing continues his search for a suitable apprentice. Few druids have truly mastered all the forms available to them, but you show the promise Morthis requires of his students. Seek him out at the Cenarion Refuge in Zangarmarsh.