Tufted duck or tufted pochard (Vịt mào, Aythya fuligula)

The tufted duck (or tufted pochard) (Aythya fuligula) is a small diving duck found in northern Eurasia. 
The duck is migratory in most of the range, and winters in the milder temperatures in southern and western Europe, southern Asia.

The name Aythya comes from the Ancient Greek word authuia, which may have referred to a sea-dwelling duck or an auklet.
The epithet fuligula is Latin fuligo 'soot' and gula 'throat' meaning sooty-throated.