Birds (class) (Aves) is a biological class of the kingdom Animalia and phylum Chordata.
Suliformes
Gruiformes
Leptosomiformes
Cuculiformes
Anseriformes
Falconiformes
Phoenicopteriformes
Podicipediformes
Accipitriformes
Bucerotiformes
Apterygiformes
Gaviiformes
Coraciiformes
Coliiformes
Struthioniformes
Strigiformes
Sphenisciformes
Passeriformes
Rheiformes
Ciconiiformes
Tinamiformes
Trogoniformes
Phaethontiformes
Procellariiformes
Piciformes
Amphibia
Aves
Chondrichthyes
Leptocardii
Myxini
Cephalaspidomorphi
Dipnoi
Mammalia
Actinopterygii
Reptilia