Children (19 direct children, 21 direct and indirect children):
European storm petrel
(tree size 2)
European storm-petrel
Hydrobates macrodactylus
Hydrobates microsoma
Hydrobates castro
Hydrobates furcatus
Hydrobates homochroa
Hydrobates hornbyi
Hydrobates leucorhous
Hydrobates markhami
Hydrobates matsudairae
Hydrobates melania
Swinhoe’s storm petrel
Hydrobates monteiroi
Hydrobates tethys
Tristram’s storm petrel
Hydrobates pelagica
Hydrobates jabejabe
Hydrobates socorroensis
Hydrobates cheimomnestes