owlet-nightjars Apodiformes Worldwide; 478 species Hemiprocnidae: treeswifts Apodidae: swifts Trochilidae: hummingbirds Otidimorphae Cuculiformes Worldwide; 150 species Cuculidae: cuckoos and relatives Musophagiformes Africa; 23 species Musophagidae: turacos and relatives Otidiformes Africa and Eurasia; 27 species Otididae: bustards Gruae Opisthocomiformes South America; 1 species Opisthocomidae: hoatzin Gruiformes Worldwide; 164 species Grui: cranes and allies Gruidae: cranes Aramidae: limpkin Psophiidae: trumpeters Ralli: rails and allies †Aptornithidae: adzebills Heliornithidae: finfoots Sarothruridae: flufftails Rallidae: rails and relatives Charadriiformes Worldwide; 350 species Charadrii Chionida: thick-knees and allies Burhinidae: thick-knees and relatives Chionididae: sheathbills Pluvianellidae: Magellanic plover Charadriida: plover-like waders Pluvialidae: golden plovers Ibidorhynchidae: ibisbill Haematopodidae: oystercatchers Recurvirostridae: avocets and stilts Charadriidae: plovers and lapwings Scolopaci Jacanida: jacana-like waders Rostratulidae: painted snipes Pluvianidae: Egyptian plover Jacanidae: jacanas Thinocoridae: seedsnipes Pedionomidae: plains-wanderer Scolopacida Scolopacidae: sandpipers and relatives Lari Turnicida Turnicidae: buttonquail Larida: gulls and allies Glareolidae: coursers and pratincoles Dromadidae: crab-plover Stercorariidae: skuas and jaegers Alcidae: auks and puffins Laridae: gulls, skimmers and terns Phaethontimorphae Eurypygiformes Neotropics and New Caledonia; 2 species Rhynochetidae: kagu Eurypygidae: sunbittern Phaethontiformes Oceanic; 3 species Phaethontidae: tropicbirds Aequornithes Gaviiformes North America, Eurasia; 5 species Gaviidae: loons Sphenisciformes Antarctic and southern waters; 17 species Spheniscidae: penguins Procellariiformes Pan-oceanic; 120 species Diomedeidae: albatrosses Oceanitidae: austral storm petrels Hydrobatidae: northern storm petrels Procellariidae: petrels and relatives Ciconiiformes Worldwide; 19 species Ciconiidae: storks Suliformes Worldwide; 59 species Fregatae Fregatidae: frigatebirds Sulae Sulidae: boobies and gannets Anhingidae: darters Phalacrocoracidae: cormorants and shags Pelecaniformes Worldwide; 108 species Threskiornithes Threskiornithidae: ibises and spoonbills Pelecani Scopidae: hamerkop Balaenicipitidae: shoebill Pelecanidae: pelicans Ardeae Ardeidae: herons and relatives Afroaves Accipitriformes Worldwide; 260 species Cathartae Cathartidae: New World vultures Accipitres Sagittariidae: secretarybird Pandionidae: osprey Accipitridae: hawks, eagles, buzzards, harriers, kites and Old World vultures Strigiformes Worldwide; 250 species Tytonidae: barn owls Strigidae: true owls Coliiformes Sub-Saharan Africa; 6 species Coliidae: mousebirds Leptosomiformes Madagascar; 1 species Leptosomidae: cuckoo-roller Trogoniformes Sub-Saharan Africa, Americas, Asia; 35 species Trogonidae: trogons and quetzals Bucerotiformes Old World, New Guinea; 64 species Buceroidea Bucerotidae: hornbills Upupoidea Upupidae: hoopoe Phoeniculidae: woodhoopoes Coraciiformes Worldwide; 144 species Meropi Meropidae: bee-eaters Coracii Coraciidae: rollers Brachypteraciidae: ground rollers Coracii Todidae: todies Momotidae: motmots Alcedinidae: kingfishers Piciformes Worldwide except Australasia; 400 species Galbuli Galbulidae: jacamars Bucconidae: puffbirds Pici Lybiidae: African barbets Megalaimidae: Asian barbets Ramphastidae: toucans Semnornithidae: toucan barbets Capitonidae: American barbets Picidae: woodpeckers Indicatoridae: honeyguides Australaves Cariamiformes South America; 2 species Cariamidae: seriemas Falconiformes Worldwide; 60 species Falconidae: falcons and relatives Psittaciformes Pan-tropical, southern temperate zones;