Children (12 direct children, 111 direct and indirect children):
Rollandia
(tree size 5)
Rollandia (bird)
Aechmophorus
(tree size 7)
Tachybaptus
(tree size 28)
Podilymbus
(tree size 7)
Pied-billed grebe
Poliocephalus
(tree size 2)
Poliocephalus (bird)
Podiceps
(tree size 45)
Podicipedini
Podilymbini
Pliolymbus
(tree size 1)
Miodytes
(tree size 1)
Thiornis
(tree size 1)
Miobaptus
(tree size 2)