Common Shelduck Common Shelduck Tadorna tadorna, Cape Nanhui, Shanghai, January. Common Shelduck is an uncommon winter visitor in Shanghai. (Craig Brelsford) Flock, Cape Nanhui, December. (Craig Brelsford) Inner Mongolia, China, September. (Craig Brelsford) Go to Birds of China page Be notified every time we post. Send an email with “Subscribe” as the subject to info@shanghaibirding.com Donate to Shanghai Birding! Choose your level (USD)Well-wisher—$10Buddy—$5Friend—$25Supporter—$50Donor—$100Sponsor—$500Champion—$1000