Based on J. L. Peters et al., Checklist of the Birds of the World, Harvard University Press/Museum of Comparative Zoology, 1931-1986.
This list departs slightly from the strict Peters list. Peter's Checklist was written over a fifty-year period, during which thinking about the classification of birds changed. A further problem is that the chronological order of the volumes did not correspond to the taxonomic order. An example of the problems that this created can be seen from the Introduction to Volume XI, edited by E. Mayr and G. W. Cottrell, the last volume to appear, in 1986. They state: 'The designation Muscicapidae was used in Checklist, Volumes X (1964) and XII (1967), in the broad sense of Hartert. It included thrushes, babblers, whistlers and numerous aberrant groups. None of these is any longer included in the Muscicapidae as now delimited on the basis of the researches of Charles G. Sibley and others.'

STRUTHIONIFORMES
STRUTHIONIDAE Ostriches (Complete)
RHEIDAE Rheas (Complete)
CASUARIIDAE Cassowaries (Complete)
DROMAIIDAE Emus (Complete)
APTERYGIDAE Kiwis (Complete)

TINAMIFORMES
TINAMIDAE Tinamous (Complete)

PROCELLARIIFORMES
DIOMEDEIDAE Albatrosses (Complete)
PROCELLARIIDAE Fulmars,Petrels and Shearwaters (Complete)
HYDROBATIDAE Storm Petrels (Complete)
PELECANOIDIDAE Diving Petrels (Complete)

SPHENISCIFORMES
SPHENISCIDAE Penguins (Complete)

GAVIIFORMES
GAVIIDAE Loons (Complete)

PODICIPEDIFORMES
PODICIPEDIDAE Grebes (Complete)

PELECANIFORMES
PHAETHONTIDAE Tropicbirds (Complete)
FREGATIDAE Frigatebirds (Complete)
PHALACROCORACIDAE(Phalacrocoracinae) Cormorants (Complete)
PHALACROCORACIDAE(Anhinginae) Darters (Complete)
SULIDAE Boobies,Gannets (Complete)
PELECANIDAE Pelicans (Complete)

CICONIIFORMES
ARDEIDAE(Ardeinae) Day Herons (Complete)
ARDEIDAE(Nycticoracinae,Nycticoracini) Night Herons (Complete)
ARDEIDAE(Nycticoracinae,Cochleariini) Boat-billed Heron (Complete)
ARDEIDAE(Tigrisomatinae) Tiger Herons (Complete)
ARDEIDAE(Botaurinae,Zebrilini) Zigzag Heron (Complete)
ARDEIDAE(Botaurinae,Botaurini) Bitterns (Complete)
SCOPIDAE Hammerhead (Complete)
CICONIIDAE(Mycteriini):Storks (Complete)
CICONIIDAE(Ciconiini) Storks (Complete)
CICONIIDAE(Leptoptilini) Storks (Complete)
BALAENICIPITIDAE Shoebill (Complete)
THRESKIORNITHIDAE(Threskiornithinae) Ibises (Complete)
THRESKIORNITHIDAE(Plataleinae) Spoonbills (Complete)

PHOENICOPTERIFORMES
PHOENICOPTERIDAE Flamingos (Complete)

FALCONIFORMES
CATHARTIDAE American Vultures (Complete)
ACCIPTRIDAE(Pandioninae)Ospreys (Complete)
ACCIPITRIDAE(Acciptrinae) Hawks,Eagles(Complete)
SAGITTARIIDAE Secretarybird (Complete)
FALCONIDAE(Polyborinae) Caracaras (Complete)
FALCONIDAE(Falconinae) Falcons (Complete)

ANSERIFORMES
ANATIDAE(Anseranatinae) Pied Geese (Complete)
ANATIDAE(Dendrocygninae) Whistling Ducks (Complete)
ANATIDAE(Anserinae) Swans and Geese (Complete)
ANATIDAE(Tadorninae) Shelducks (Complete)
ANATIDAE(Anatinae):Typical Ducks (Complete )
ANATIDAE(Merginae) Sea Ducks (Distribution done, synonymy complete to Melanitta deglandi 9 May,2008)
ANATIDAE(Oxyurinae) Stifftailed Ducks (Distribution done, synonymy partially complete)
ANHIMIDAE Screamers (Distribution done, synonymy partially complete)

GALLIFORMES
MEGAPODIIDAE Megapodes (Complete)
CRACIDAE Curassows,Guans,Chachalacas (Complete)
TETRAONIDAE Grouse,Ptarmigan (Complete)
PHASIANIDAE(Odontophorinae) American Quail (Complete)
PHASIANIDAE(Phasianinae) Partridges,Quails,Pheasants (Complete)
NUMIDIDAE Guinea-fowl (Complete)
MELEAGRIDIDAE Turkeys (Complete)
OPISTHOCOMIDAE Hoatzin (Complete)

GRUIFORMES
MESOENATIDAE Mesites,Monias (Distribution complete, partial synonymy)
TURNICIDAE Bustard-Quails (Distribution complete, partial synonymy)
PEDIONOMIDAE Collared Hemipode (Distribution done, partial synonymy)
GRUIDAE(Gruinae) Cranes (Complete)
GRUIDAE(Balearicinae) Crowned Cranes (Complete)
ARAMIDAE Limpkin (Complete)
PSOPHIIDAE Trumpeters (Complete)
RALLIDAE Rails,Gallinules (Complete)
RALLIDAE(Fulicinae) Coots (Complete)
HELIORNITHIDAE Sun-Grebes (Complete)
RHYNOCHETIDAE Kagu (Complete)
EURYPIGIDAE Sunbittern (Complete)
CARIAMIDAE Cariamas (Complete)
OTIDAE Bustards (Complete)

CHARADRIIFORMES
JACANIDAE Jacanas (Complete)
ROSTRATULIDAE Painted Snipe (Complete)
CHARADRIIDAE(Vanellinae) Lapwings (Complete)
CHARADRIIDAE(Charadriinae) Plovers (Complete)
SCOLOPACIDAE(Tringinae) Sandpipers (Complete)
SCOLOPACIDAE(Arenariinae) Surfbird,Turnstones (Complete)
SCOLOPACIDAE(Scolopacinae) Woodcocks,Snipe (Complete)
SCOLOPACIDAE(Eroliinae) Sandpipers (Complete)
RECURVIROSTRIDAE(Ibidorhynchinae) Ibisbill (Complete)
RECURVIROSTRIDAE(Recurvirostrinae) Avocets,Stilts (Complete)
PHALAROPODIDAE Phalaropes (Complete)
DROMADIDAE Crab Plover (Complete)
BURHINIDAE Thick-knees (Complete)
GLAREOLIDAE(Cursoriinae) Coursers (Complete)
GLAREOLIDAE(Glareolinae) Pratincoles (Complete)
THINOCORIDAE Seedsnipe (Complete)
CHIONIDIDAE Sheathbills (Complete)
STERCORARIIDAE Skuas,Jaegers(Complete)
LARIDAE(Larinae) Gulls(Complete)
LARIDAE(Sterninae) Terns(Complete;genera Sternula,Onychoprion and Thalasseus added Feb.2008))
RYNCHOPIDAE Skimmers(Complete)
ALCIDAE Auks,Murres,Puffins (Complete)

COLUMBIFORMES
PTEROCLIDIDAE Sand-grouse (Complete)
RAPHIDAE Dodos,Solitaires
COLUMBIDAE(Treroninae) Fruit-pigeons(Complete)
COLUMBIDAE(Columbinae) Pigeons,Doves (Complete to Zenaida galapagoensis 4 May,2008)
COLUMBIDAE(Gourinae) Crowned Pigeons
COLUMBIDAE(Didunculinae) Tooth-billed Pigeon

PSITTACIFORMES
PSITTACIDAE(Strigopinae) Owl Parrot (Complete)
(Complete)
PSITTACIDAE(Nestorinae) Keas (Complete)
(Complete)
PSITTACIDAE(Loriinae) Lories (Complete)
(Complete)
PSITTACIDAE(Micropsittinae) Pygmy Parrots (Complete)
PSITTACIDAE(Kakatoeinae) Cockatoos (Complete)
PSITTACIDAE(Psittacinae) Macaws,Parrots (Complete)

CUCULIFORMES
MUSOPHAGIDAE Plantain-eaters
CUCULIDAE(Cuculinae) Cuckoos
CUCULIDAE(Phaenicophaeinae) American Cuckoos,Malkohas
CUCULIDAE(Crotophaginae) Anis,Guira
CUCULIDAE(Neomorphinae) Roadrunners,Ground Cuckoos
CUCULIDAE(Couinae) Couas
CUCULIDAE(Centropodinae) Coucals

STRIGIFORMES
TYTONIDAE(Tytoninae) Barn Owls (Complete)
(Complete)
TYTONIDAE(Phodilinae) Bay Owls (Complete)
(Complete)
STRIGIDAE(Buboninae) Typical Owls (Complete)
(Complete)
STRIGIDAE(Striginae) Typical Owls (Complete)
(Complete)

CAPRIMULGIFORMES
STEATORNITHIDAE Oilbird (Complete)
(Complete)
PODARGIDAE Frogmouths (Distribution)
NYCTIBIIDAE Potoos (Distribution)
AEGOTHELIDAE Owlet-Nightjars (partial Distribution)
CAPRIMULGIDAE(Chordeilinae) Nighthawks
CAPRIMULGIDAE(Caprimulginae) Goatsuckers

APODIFORMES
APODIDAE(Chaeturinae) Spine-tailed Swifts
HEMIPROCNIDAE Crested Swifts
TROCHILIDAE Hummingbirds (Complete)

COLIIFORMES
COLIIDAE Mousebirds

TROGONIFORMES
TROGONIDAE Trogons

CORACIIFORMES
ALCEDINIDAE(Cerylinae) Cerylid Kingfishers
ALCEDINIDAE(Alcedininae) Alcedinid Kingfishers
ALCEDINIDAE(Daceloninae) Dacelonid Kingfishers
TODIDAE Todies
MOMOTIDAE Motmots (Complete 1 May 2008)
MEROPIDAE Bee-eaters
LEPTOSOMIDAE Cuckoo-Roller
CORACIIDAE(Brachypteraciinae) Ground-Rollers
CORACIIDAE((Coraciinae) Typical Rollers
UPUPIDAE Hoopoes
PHOENICULIDAE Woodhoopoes
BUCEROTIDAE Hornbills

PICIFORMES
GALBULIDAE Jacamars (Complete)
BUCCONIDAE Puffbirds (Complete)
CAPITONIDAE Barbets
INDICATORIDAE Honeyguides
RAMPHASTIDAE Toucans (Complete)
PICIDAE(Jynginae) Wrynecks
PICIDAE(Picumninae) Piculets
PICIDAE(Picinae) Woodpeckers