Huntmaster's Dire Wolfhawk

If asked to fetch, will most likely bring you back the head of a small mammal or humanoid.

Riding Requirements:

This mount is available to all eligible characters on your account.
Level 10
Apprentice Riding (ground)
Expert Riding (flying)
Hunters only

Source:

Pan the Kind Hand in Trueshot Lodge.
Cost: 1000

Notes:

This grey-blue wolfhawk may be purchased from the Hunter Order Hall in Legion after completing the scenario to obtain the Huntmaster's Loyal Wolfhawk. See that mount for more information.

Note that you originally had to level your Marksmanship artifact before you could buy this mount, but that requirement was removed in Battle for Azeroth.

Introduced in:

Patch 7.2

Travel Mode:

Ground (+60% or +100% speed)
Flying (+150%, +280% or +310% speed)

Speed depends on your riding skill.

Other Mounts Using the Same Model:

Huntmaster's Fierce Wolfhawk

Huntmaster's Loyal Wolfhawk

More info on Wowhead:

Huntmaster's Dire Wolfhawk taught by Trust of a Dire Wolfhawk