Birds have a tremendous variety of combinations of feather components.
For instance the Crowned Crane crest feathers are each made up of a short quill, a twisted rachis, and few barbs. Fly tiers somewhat incorrectly refer to this part of the feather as being the web or webby portion of the feather. Web is a term synonymous with the whole vane. Some feathers have barbules without barbicels. Examples would include peacock upper tail covert feather barbs below the eye as well as down feathers from any bird.