quillwork
/ˈkwɪl.wɜːrk/Definitions
1. noun
ornamentation made by decorating with quills, especially on leather, or a design created by sewing or arranging quill-like patterns
“The museum exhibit showcased beautiful examples of quillwork used in traditional Native American clothing.”
2. verb
to decorate with quills, especially on leather
“The craftswoman spent hours quillworking a intricate design onto the leather belt.”