Children (6 direct children, 279 direct and indirect children):
Anhingidae
(tree size 27)
The darter family
Plotopteridae
(tree size 12)
Sulids
(tree size 51)
Sulidae
Phalacrocoracidae
(tree size 160)
Cormorant family
Sulae
Frigatebirds
(tree size 23)
Fregatidae