Children (10 direct children, 15 direct and indirect children):
Stercorarius antarcticus
(tree size 3)
Brown skua
Parasitic jaeger
Arctic skua
Great skua
Stercorarius skua
Pomarine skua
Pomarine jaeger
Long-tailed jaeger
(tree size 2)
Long-tailed skua
South polar skua
Stercorarius maccormicki
Chilean skua
Stercorarius chilensis
Stercorarius lonnbergi
Brown skua
Stercorarius asiaticus
Stercorarius longicaudatus