The only web sites I can find that list the components for the Plane of
Sky Mask of the Songbird Quest show: Ocher Tessara, Songbird Statuette,

Light Woolen MANTLE. Now, the Light Woolen Mantle is also used in the
Songweaver's Mantle quest, and I have seen some posts that suggest that
this is a typo, and that what is required is a Light Woolen MASK.

Have any of you completed this quest, and if so, what object is needed?
And do you remember which MOB(s) dropped it? I heard it's the
Shimmering Meteors, which my guild never does because of their really
annoying knockback effect. I hate to ask my guild to try killing them
if it's pointless.

So far, we've never seen a Light Woolen anything.

Kenross Cantoforjado, 54 songs, Innoruuk

PS - Does anyone have a link to anyplace that lists all of the Sky
components and the quests they're for?