1. RHEIFORMES Rheas

2. STRUTHIONIFORMES Ostrich

3. CASSUARIIFORMES emus and cassowaries

4. DINORNITHIFORMES kiwis

5. AEPYORNITHIFORMES Elephant-birds

6. TINAMIFORMES tinamous

7. GAVIIFORMES loons

8. PODICIPEDIFORMES grebes

9. SPHENISCIFORMES penguins

10. PROCELLARIIFORMES albatrosses, shearwaters, petrels, and fulmars

11. PELECANIFORMES tropicbirds, frigatebirds, boobies, gannets, cormorants, anhingas, and pelicans

13. ANSERIFORMES screamers, swans, ducks, and geese

15. PHOENICOPTERIFORMES flamingos

16. CICONIIFORMES herons, bitterns, ibises, spoonbills, storks, and new world vultures

18. FALCONIFORMES ospreys, hawks, eagles, kites, secretarybird, falcons, and caracaras

20. GALLIFORMES curassows, guans, chachalacas, megapods, guineafowl, pheasants, quail, grouse, and turkeys

22. GRUIFORMES rails, coots, sungrebes, sunbitterns, button-quail, cranes, limpkins, trumpeters, seriemas, and bustards

24. CHARADRIIFORMES jacanas, woodcocks, snipes, sandpipers, phalaropes, plovers, sandgrouse, oystercatchers, avocets, stilts, lapwings, gulls, terns, jaegers, skuas, skimmers, auks, murres, and puffins

27. COLUMBIFORMES pigeons and doves

28. PSITTACIFORMES parrots, macaws, cockatoos, and lories

29. COLIIFORMES mousebirds

30. MUSOPHAGIFORMES turacos and plantaineaters

31. CUCULIFORMES cuckoos and roadrunners

32. OPISTHOCOMIFORMES hoatzin

33. STRIGIFORMES barn-owls, and owls

34. CAPRIMULGIFORMES oilbirds, frogmouths, potoos, and nightjars

35. APODIFORMES swifts and hummingbirds

36. TROGONIFORMES trogons and quetzals

37. CORACIIFORMES kingfishers, todies, motmots, bee-eaters, rollers, groundrollers

39. BUCEROTIFORMES hornbills (formerly in Coraciiformes)

40. UPUPIFORMES hoopoes and wood-hoopoes (formerly in Coraciiformes)

41. PICIFORMES jacmars, puffbirds, barbets, honeyguides, toucans, wrynecks, piculets, and woodpeckers

43. PASSERIFORMES flycatchers, vireos, swallows, thrushes, jays, warblers, sparrows, blackbirds, and finches