Morphological Classification of Birds
Class Aves
               Subclass Neornithes
                              Superorder Paleognathae------------------------Order Tinamiformes  (Tinamous)
                                                                                               Order Rheiformes  (Rheas)
                                                                                               Order Struthioniformes  (Ostrich)
                                                                                               Order Casuariiformes  (Cassowaries/Emus)                      
                              Superorder Neognathae--------------------------Order Sphenisciformes (Penguins)
                                                                                               Order Gaviiformes  (Loons)
                                                                                               Order Podicipediformes (Grebes)
                                                                                               Order Procellariiformes (Albatrosses/Petrels)
                                                                                               Order Pelecaniformes  (Cormorants/Pelecans/Gannets)
                                                                                               Order Ciconiiformes  (Herons/Storks/Flamingos)
                                                                                               Order Anseriformes  (Swans/Geese/Ducks)
                                                                                               Order Falconiformes  (Hawks/Eagles/Falcons)
                                                                                               Order Galliformes  (Pheasants/Grouse/Quail/Turkeys)
                                                                                               Order Gruiformes  (Rails/Cranes)
                                                                                               Order Charadriiformes  (Woodcocks/Plovers/Gulls/Phalaropes etc.)
                                                                                               Order Columbiformes  (Pigeons/Doves)
                                                                                               Order Psittaciformes  (Parrots/Macaws/Lories etc.)
                                                                                               Order Cuculiformes  (Cuckoos/Roadrunners etc.)
                                                                                               Order Strigiformes  (Barn Owls/ Typical Owls)
                                                                                               Order Caprimulgiformes  (Nighthawks/Nightjars)
                                                                                               Order Apodiformes  (Swifts)
                                                                                               Order Coliiformes  (Colies)
                                                                                               Order Trogoniformes  (Trogons/Quetzal)
                                                                                               Order Coraciiformes  (Kingfishers/Hornbills)
                                                                                               Order Piciformes  (Woodpeckers/Toucans)
                                                                                               Order Passeriformes  (Swallows/Wrens/Warblers/Finches/Starlings)