The disproportionate number of rails in this list reflects the tendency of that family to lose the ability to fly when geographically isolated.
Pycnonotidae – bulbuls Sylvioidea incertae sedis Sturnidae – starlings Turdidae – thrushes and allies Mimidae – mockingbirds and thrashers Estrildidae – estrildid finches (waxbills, munias, etc.)
National and international conservation projects and research publications such as red lists usually focus on species as a whole.
Ratites and related birds Ducks, geese and swans Quails and relatives Shorebirds, gulls and auks Scolopacidae – sandpipers Turnicidae – buttonquails Rails and allies – probably paraphyletic Herons and related birds – possibly paraphyletic Pigeons, doves and dodos Cuckoos True owls and barn owls Strigidae – true owls Tytonidae – barn owls Swifts and hummingbirds Kingfishers and related birds Woodpeckers and related birds Birds of prey Falcons Parrots Perching birds Pittidae – pittas Tyrannidae – tyrant flycatchers Furnariidae – ovenbirds Formicariidae – antpittas and antthrushes Maluridae – Australasian "wrens" Pardalotidae – pardalotes, scrubwrens, thornbills and gerygones Petroicidae – Australasian "robins" Cinclosomatidae – whipbirds and allies Artamidae – woodswallows, currawongs and allies Monarchidae – monarch flycatchers Rhipiduridae – fantails Campephagidae – cuckooshrikes and trillers Oriolidae – Old World orioles and allies Corvidae – crows, ravens, jays and magpies Regulidae – kinglets Hirundinidae – swallows and martins Phylloscopidae – phylloscopid warblers or leaf warblers Cettiidae – cettiid warblers or typical bush warblers Acrocephalidae – acrocephalid warblers or marsh warblers, tree warblers and reed warblers Pycnonotidae – bulbuls Cisticolidae – cisticolas and allies Sylviidae – sylviid ("true") warblers and parrotbills Zosteropidae – white-eyes.
Timaliidae – Old World babblers "African warblers" Sylvioidea incertae sedis Troglodytidae – wrens Paridae – tits, chickadees and titmice Cinclidae – dippers Muscicapidae – Old World flycatchers and chats Turdidae – thrushes and allies Mimidae – mockingbirds and thrashers Estrildidae – estrildid finches (waxbills, munias, etc.)