Cotton pygmy goose or cotton teal 
(Le khoang cổ, Nettapus coromandelianus)

The cotton pygmy goose or cotton teal (Nettapus coromandelianus) is a small perching duck which breeds in Asia, Southeast Asia extending south and east to Queensland where they are sometimes called white-quilled pygmy goose.

anser: Latin anser goose;
anas, anatis: Latin duck.
Nettapus: Ancient Greek nētta meaning "duck" and pous meaning "foot".
coromandelianus: Coromandel Coast (= Karnataka), India.