Children (31 direct children, 301 direct and indirect children):
Aix
(tree size 2)
Aix (bird)
Anas
(tree size 160)
Aythya
(tree size 16)
Pygmy goose
(tree size 6)
Nettapus
Mergus
(tree size 13)
Scoter
(tree size 11)
Melanitta
Bucephala
(tree size 5)
Goldeneye
Aythyini
(tree size 2)
Pochard
Biziura
(tree size 4)
Eider
(tree size 11)
Somateria
Netta
(tree size 6)
Oxyura
(tree size 12)
Stiff-tailed duck
Anatini
(tree size 2)
Cairini
Somaterini
Salvadorina
(tree size 1)
Moa-nalo
(tree size 7)
Thambetochenini
Malacorhynchini
Clangula
(tree size 1)
Chenonetta
(tree size 2)
Malacorhynchus
(tree size 2)
Somateriini
Histrionicus
Harlequin ducks
Mergellus
(tree size 1)
Smew
Polysticta
(tree size 1)
Callonetta
(tree size 1)
Matanas
(tree size 1)
Bambolinetta
(tree size 1)
Anabernicula
Mergini
(tree size 2)
Oxyurini