Parent: Threskiornithidae (Ibises)

└─ Threskiornis

└─── Threskiornis aethiopicus (Sacred ibis)

└─── Threskiornis bernieri (Malagasy sacred ibis)

└─── Threskiornis melanocephalus (Black-headed ibis)

└─── Threskiornis molucca (Australian white ibis)

└─── Threskiornis solitarius

└─── Threskiornis spinicollis (Straw-necked ibis)