Struthioniformes, # families, # species, Range
Ostriches, 1, 2-10
Struthioniformes geographic range
Africa (Afrotropical)
Rheiformes, # families, # species
Rheas, 1, 2-10
Rheiformes geographic range
Neotropics (South America)
Tinamiformes # families, # species
Tinamous, 1, 10-50
Tinamiformes geographic range
Neotropics (south America)
Casuariiformes, # families, # species
Cassowaries and emus, 2-10, 2-10
Casuariiformes geographic range
Australia and New Guinea (Australasian)
Apterygiformes, # families, # species
Kiwis, 1, 2-10
Apterygiformes geographic range
New Zealand
Anseriformes, # families, # species
waterfowl, ducks, geese, swans, 2-10, 101-400
Anseriformes geographic range
worldwide
Galliformes, # families, # species
Pheasants, chickens, quail, currassows, fowl-like birds, 2-10, 101-400
Galliformes geographic range
worldwide except antarctica
Phoenicopteriformes # families, # species
Flamingos, 1, 2-10
Phoenicopteriformes geographic range
Tropics, high Andes
Podicipediformes # families, # species
Grebes, 1, 10-50
Podicipediformes geographic range
Worldwide except Antarctica
Columbiformes # families, # species
Pigeons, doves, 1, 101-400
Columbiformes geographic range
Worldwide except antarctica
Mesitornithiformes # families, # species
Mesites, 1, 2-10
Mesitornithiformes geographic range
Madagascar
Pteroclidiformes # families, # species
Sandgrouse, 1, 2-10
Pteroclidiformes geographic range
Old world
Otidiformes # families, # species
Bustards, 1, 10-50
Otidiformes geographic range
Old world
Musophagiformes # families, # species
Turaco, 1, 10-50
Musophagiformes geographic range
Afrotropical
Cuculiformes # families, # species
Cuckoo, 1, 101-400
Cuculiformes geographic range
Worldwide except antarctica
Caprimulgiformes # families, # species
Nightbirds, Nightjars, swifts, Whipporwhill, Hummingbirds, 2-10, 50-100
Caprimulgiformes range
worldwide exceot antarctica
Opisthocomiformes # families, # species
Hoatzin, 1, 1
Opisthocomiformes geographic range
South America
Gruiformes # families, # species
Cranes, rails, limpkin, coots, 10-50, 101-400
Gruiformes geographic range
Worldwide except antarctica
Charadriiformes # families, # species
gulls, shorebirds, 10-50, 400+
Charadriiformes geographic range
Worldwide
Eurypygiformes # families, # species
Kagu, sun bittern, 2-10, 2-10
Eurypygiformes geographic range
New Caledonia, Neotropics
Phaethontiformes # families, # species
Tropicbirds, 1, 2-10
Phaethontiformes geographic range
tropical oceans
Gaviiformes # families, # species
loons, diving birds, 1, 2-10
Gaviiformes geographic range
Holarctic (aka northern hemisphere)
Spenisciformes # families, # species
Penguins, 1, 10-50
Sphenisciformes geographic range
Southern oceans
Procellariiformes # families, # species
Albatross, Storm petrel, shearwater, 2-10, 101-400
Procellariiformes geographic range
All oceans
Ciconiiformes # families, # species
Storks, 2-10, 10-50,
Ciconiiformes geographic range
tropics, temperate eurasia
Suliformes # families, # species
Gannets, frigatebirds, boobies, cormorants, anhingas, 2-10, 101-400
Suliformes geographic range
mostly tropical oceans, but varies by family (cormorants are continental)
Cathartiformes # families, # species
New world vulture, condor, 1, 2-10
Cathartiformes geographic range
New world
Pelecaniformes # families, # species
Pelican, shoebill, heron, ibis, egret, bittern, spoonbill, 2-10, 101-400
Pelecaniformes range
worldwide
Accipitriformes # families, # species
Hawks, eagles, kites, osprey, old world vultures, 2-10, 101-400
Accipitriformes range
worldwide