- Swift, nimble, and elegant - the perfect mount to represent the Blood Elves.
Hawkstrider mounts are almost exclusively Horde only mounts.
Factional mounts: Apprentice
You can purchase these mounts from Winaestra <Hawkstrider Breeder> at Thuron's Livery in Eversong Woods so long as your character has riding skill of 75 (obtainable at level 20). If you are playing as any race other than a blood elf, you will also need to have Exalted reputation with the Silvermoon City.
Factional mounts: Journeyman
You can purchase these mounts from Winaestra so long as your character has riding skill of 150 (obtainable at level 40), and are restricted similarly to the apprentice mounts above.
Other Hawkstrider mounts
The Swift Warstrider is available from Raider Bork <War Mount Quartermaster> in Orgrimmar for 15 Marks of Honor.
Vicious Warstrider can be purchased with a [Vicious Saddle] from Deathguard Netharian.
Ivory Hawkstrider can be purchased for 10000 from Trinket. It requires Exalted with Talon's Vengeance.
The Silvermoon Hawkstrider and Swift Red Hawkstrider can be purchased from the Argent Tournament. You must have completed [Champion of Silvermoon City] or be a blood elf to gain access to this quartermaster.
The Sunreavers offer yet another Hawkstrider of their own to characters that are at Exalted Level.
Hawkstriders as loot
The Swift White Hawkstrider drops (rarely) from Kael'thas Sunstrider in the Magisters' Terrace on heroic mode. Both Alliance and Horde can acquire this mount.
The Starcursed Voidstrider is an achievement reward from Allied Races: Void Elf. This mount is the only Alliance-exclusive hawkstrider.