Children (9 direct children, 25 direct and indirect children):
Lesser crested tern
(tree size 4)
Thalasseus bengalensis
Great crested tern
(tree size 6)
Thalasseus bergii
Sandwich tern
(tree size 2)
Thalasseus sandvicensis
Royal tern
(tree size 2)
Thalasseus maximus
Chinese crested tern
Chinese crested-tern
Thalasseus elegans
Elegant tern
Cabot's tern
(tree size 2)
Thalasseus acuflavidus
Thalasseus albididorsalis
West african crested tern
Thalasseus eurygnathus