Wind Scales
Wind Scales can only be skinned of serpent like creatures from the Outlands and the creatures are usually between level 66 to 68 unless its an Elite. One of the main place to farm Wind Scales would be Shadowmoon Valley. The serpent to farm for Wind Scales are called Eclipson Dragonhawks located at Eclipse Point.
See below for maps to farm Wind Scales in WoW.