Difficult to classify,so will name it as a Jade Stylised Bird from the Shang Dynasty.Note the following:
01. The Jade Bird seems to be in flight with flowing plumes and aerodynamic body.
02.The Jade is Nephrite and translucent.
03.The designs are all in double-incised lines and elegantly executed.
All in all an excellent Jade Bird from the Shang Dynasty of Old China.