Children (21 direct children, 106 direct and indirect children):
Cepphus
(tree size 15)
Brachyramphus
(tree size 5)
Synthliboramphus
(tree size 10)
Aethia
(tree size 4)
Puffin
(tree size 7)
Fratercula
Uria
(tree size 15)
Alle
(tree size 3)
Pinguinus
(tree size 2)
Alca
(tree size 13)
Alca (bird)
Cerorhinca
(tree size 1)
Ptychoramphus
(tree size 3)
Alcini
Aethiinae
Alcinae
Synthliboramphini
Fraterculinae
(tree size 2)
Petralcinae
Cyclorrhynchus
(tree size 1)
Lunda
(tree size 1)
Plautus
Brachyrampus
(tree size 3)