World of Warcraft Quests involving Silvermane Howler:
Alliance & Horde
Screecher Spirits - (Step 1) Capture the spirits of 3 screechers in Feralas, then return to Yeh'kinya in Steamwheedle Port.
The Hinterlands Horde Quest
Stalking the Stalkers Huntsman Markhor at Revantusk Village in the Hinterlands wants you to kill 15 Silvermane Stalkers and 15 Silvermane Howlers. Return to him once the task is complete.
Markhor mentioned that the wolves hide in the wilds of the Hinterlands.
Scholomance Alliance & Horde
Dawn's Gambit Place Dawn's Gambit in the Viewing Room of the Scholomance. Defeat Vectus, then return to Betina Bigglezink.