Feather

Feathers are a common crafting material dropped frequently by Harpies and Turkor the Ungrateful. They are used in certain potions, and become important in Hardmode for crafting the first tier of Wings.

Other feathers
These are much rarer drops used to craft mid-tier Wings in Hardmode, and have separate IDs than the Feather item.

History
Plume Feather Перо