Catalogue entry no. 260 by Max Loehr:
260 Elongated Bird Figure_
Opaque jade, clouded pale green and bluish green. The forms of the beak and crest resemble those of the preceding pieces, but the tail, which is very long and tapers off to a small, flaring tip, is marked by a distinctive design of concentric curves framed by lines parallel to the silhouette of the tail .Identically engraved on both sides. Perforated at the breast. Late Western Chou.