Kingdom Animalia (animals) Eumetazoa (metazoans) Bilateria (bilaterally symmetrical animals) Deuterostomia (deuterostomes) Phylum Chordata (chordates) Craniata (craniates) Subphylum Vertebrata (vertebrates) Superclass Gnathostomata (jawed vertebrates) Euteleostomi (bony vertebrates) Class Sarcopterygii (lobe-finned fishes and terrestrial vertebrates) Tetrapoda (tetrapods) Amniota (amniotes) Class Reptilia (turtles, snakes, lizards, and relatives) Class Aves (birds) Subclass Neognathae (neognath birds) Infraclass Neoaves (modern birds) Order Coraciiformes (kingfishers and relatives) Family Bucerotidae (hornbills) Genus Aceros Species Aceros cassidix (knobbed hornbill) Species Aceros corrugatus (wrinkled hornbill) Species Aceros leucocephalus (white-headed hornbill) Species Aceros nipalensis (rufous-necked hornbill) Species Aceros waldeni (rufous-headed hornbill)
