[6][7] The disproportionate number of extinctions in rails reflects the tendency of that family to lose the ability to fly when geographically isolated.
For many Pacific birds that became extinct shortly after European colonization, however, this leaves an uncertainty period of over 100 years, because the islands on which they lived were only rarely visited by scientists.
Pycnonotidae – bulbuls Sylvioidea incertae sedis Sturnidae – starlings Turdidae – thrushes and allies Mimidae – mockingbirds and thrashers Estrildidae – estrildid finches (waxbills, munias, etc.)
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.)