Children (19 direct children, 20 direct and indirect children):
Aceros leucocephalus
Aceros cassidix
Aceros corrugatus
Rufous-necked hornbill
Rufous-cheeked hornbill
Aceros waldeni
Writhed-billed hornbill
Aceros comatus
White-crowned hornbill
Sumba hornbill
Aceros everetti
Papuan hornbill
(tree size 1)
Aceros plicatus
Narcondam hornbill
Aceros narcondami
Plain-pouched hornbill
Aceros subruficollis
Wreathed hornbill
Aceros undulatus
Aceros baeckstroemi
Aceros inconspicuus
Aceros langi
Aceros maculatus
Aceros meridianus
Aceros nationalis
Aceros stylostomoides
Aceros typhlus