 The feathers of "Praeornis" likely represent modified tail feathers used for display or balance, similar to those found in some other early avialans.The feathers of "Praeornis" are unique thanks to their extremely thick central quill (rachis) and stiffened barbs.In 1978, Rautian officially named the feather (cataloged as specimen PIN 2585/32) "Praeornis sharovi".