Leveling Guide - Timbermaw Ally
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The leveling guide recommends collecting Deadwood Headdress while questing, but you can't collect any of them unless you first complete Timbermaw Ally. They simply don't drop until this quest is completed. Might want to revise your guide.
https://classic.wowhead.com/item=21377/deadwood-headdress-feather#comments