ClipArt ETC
"Filoplume. In ornithology, a thread-feather; a thread-like or hair-like feather, with a very slender stem, lacking webs in most or all of its length." -Whitney, 1911

Filoplume of a Goose

"Filoplume. In ornithology, a thread-feather; a thread-like or hair-like feather, with a very slender…

"Fig. 19 - A partly pennaceous, partly plumulaceous feather, from Argus pheasant; after Nitzsch. ad, main stem; d, calamus; a, rhachis; c, c, c, vanes, cut away on left side in order not to interfere with b, the after-shaft, the whole of the right vane of which is likewise cut away." Elliot Coues, 1884

Feather from a Argus Pheasant

"Fig. 19 - A partly pennaceous, partly plumulaceous feather, from Argus pheasant; after Nitzsch. ad,…