Children (13 direct children, 19 direct and indirect children):
Black-headed gull
(tree size 1)
Chroicocephalus ridibundus
Brown-headed gull
Chroicocephalus brunnicephalus
Chroicocephalus scopulinus
Chroicocephalus novaehollandiae scopulinus
Slender-billed gull
Chroicocephalus genei
Andean gull
Chroicocephalus serranus
Bonaparte's gull
Chroicocephalus philadelphia
Grey-headed gull
(tree size 2)
Chroicocephalus cirrocephalus
Silver gull
(tree size 3)
Chroicocephalus novaehollandiae
Saunders’s gull
Chroicocephalus saundersi
Brown-hooded gull
Chroicocephalus maculipennis
Black-billed gull
Chroicocephalus bulleri
Hartlaub's gull
Chroicocephalus hartlaubii
Chroicocephalus tibetanus