Chris Schram collection, Westminster, Colorado
Side 2 of the Colorado bird figure shares a similar morphology to the below figure from Germany. These may have been created using a related idealized artistic scheme or template rather than just coincidentally reflecting the natural bird form.
Germany bird sculpture, ca. 200,000 years before present along with the Colorado example identified by Mr. Schram
Photograph © Walther Matthes. Matthes, W. (1969). Published in Eiszeitkunst im Nordseeraum. Otterndorf, Gr: Niederelbe-Verlag; (1964/1965). Bild 62. Mousterian context (Neanderthal) artifact from Germany as seen at Originsnet.org