Le genre Aythya comprend douze espèces. Leur nom normalisé est fuligule. Ce sont des canards plongeurs.

1/ Fuligule milouinan
Greater scaup (Vịt biển, Aythya marila), scaup in Europe, or "bluebill" in North America
The epithet marila is from the Greek word for charcoal embers or coal dust.

2/ Fuligule de Baer
Baer's pochard (Vịt đầu đen, Aythya baeri) 

3/ Fuligule milouin
Common pochard (Vịt đầu đỏ, Aythya ferina), known simply as pochard

4/ Fuligule morillon
Tufted duck or tufted pochard (Vịt mào, Aythya fuligula)
The epithet is from Latin fuligo 'soot' and gula 'throat'.

5/ Fuligule nyroca
Ferruginous duck (Vịt mặt trắng, Aythya nyroca), also known as ferruginous pochard, common white-eye or white-eyed pochard
The epithet is from nyrok, the Russian name for a duck.