Common shelduck (Vịt khoang, Tadorna tadorna)

The common shelduck (Tadorna tadorna) is a waterfowl species of the shelduck genus, Tadorna. 
The bird is widespread and common in the Euro-Siberian region of the Palearctic, breeding in temperate regions and wintering in subtropical regions.
This species is mainly associated with lakes and rivers in open country, breeding in rabbit burrows, tree holes, haystacks or similar. In winter it is common on suitable estuaries and tidal mudflats as well.

anser: Latin anser goose;
anas, anatis: Latin duck.
The genus Tadorna name comes from the French name Tadorne for the common shelduck.