Lesser whistling duck
also known as Indian whistling duck or lesser whistling teal
(Le nâu or Le le, Dendrocygna javanica)

The lesser whistling duck (Dendrocygna javanica), also known as Indian whistling duck or lesser whistling teal, is a species of whistling duck that breeds in the Indian subcontinent and Southeast Asia.

anser: Latin anser goose;
anas, anatis: Latin duck.
Dendrocygna: Greek dendron tree; genus Cygnus;
cygnus: Latin swan;
Greek kuknos swan;