[{"n": "Aegialornithidae", "u": "/e/prehistoric-bird-families/aegialornithidae/", "s": "Prehistoric apodiform birds intermediate between swifts and owlet-nightjars."}, {"n": "Aepyornithidae", "u": "/e/prehistoric-bird-families/aepyornithidae/", "s": "Giant flightless birds of Madagascar that laid the largest eggs."}, {"n": "Ameghinornithidae", "u": "/e/prehistoric-bird-families/ameghinornithidae/", "s": "Extinct bird family from the Eocene–Oligocene of Europe."}, {"n": "Anachronornithidae", "u": "/e/prehistoric-bird-families/anachronornithidae/", "s": "Extinct basal anseriform family from the Late Paleocene of North America."}, {"n": "Aptornithidae", "u": "/e/prehistoric-bird-families/aptornithidae/", "s": "Extinct flightless birds endemic to New Zealand."}, {"n": "Archaeotrogonidae", "u": "/e/prehistoric-bird-families/archaeotrogonidae/", "s": "Prehistoric bird family related to nightjars from the Eocene and Oligocene."}, {"n": "Avisauridae", "u": "/e/prehistoric-bird-families/avisauridae/", "s": "Cretaceous enantiornithine dinosaurs with distinctive ankle bones."}, {"n": "Dromornithidae", "u": "/e/prehistoric-bird-families/dromornithidae/", "s": "Extinct giant flightless birds from Australia."}, {"n": "Eleutherornithidae", "u": "/e/prehistoric-bird-families/eleutherornithidae/", "s": "A disputed European relative of the terror birds."}, {"n": "Eogruidae", "u": "/e/prehistoric-bird-families/eogruidae/", "s": "Extinct flightless birds from Asia, related to ostriches."}, {"n": "Gastornithidae", "u": "/e/prehistoric-bird-families/gastornithidae/", "s": "Extinct family of large, flightless, herbivorous birds."}, {"n": "Geranoididae", "u": "/e/prehistoric-bird-families/geranoididae/", "s": "Extinct long-legged flightless birds of the Eocene."}, {"n": "Halcyornithidae", "u": "/e/prehistoric-bird-families/halcyornithidae/", "s": "Extinct Eocene birds related to parrots and songbirds."}, {"n": "Laornithidae", "u": "/e/prehistoric-bird-families/laornithidae/", "s": "A prehistoric bird family known from a single leg bone."}, {"n": "Lithornithidae", "u": "/e/prehistoric-bird-families/lithornithidae/", "s": "Extinct early paleognath birds with probing bills."}, {"n": "Messelasturidae", "u": "/e/prehistoric-bird-families/messelasturidae/", "s": "Extinct Eocene bird family with hawk-parrot mosaic traits."}, {"n": "Morsoravidae", "u": "/e/prehistoric-bird-families/morsoravidae/", "s": "Extinct bird family related to parrots and songbirds."}, {"n": "Palaelodidae", "u": "/e/prehistoric-bird-families/palaelodidae/", "s": "Extinct relatives of flamingos, widespread from Oligocene to Pleistocene."}, {"n": "Pelagornithidae", "u": "/e/prehistoric-bird-families/pelagornithidae/", "s": "Prehistoric seabirds with tooth-like beak projections and vast wingspans."}, {"n": "Phorusrhacidae", "u": "/e/prehistoric-bird-families/phorusrhacidae/", "s": "Extinct family of large carnivorous flightless birds."}, {"n": "Plotopteridae", "u": "/e/prehistoric-bird-families/plotopteridae/", "s": "Extinct flightless seabirds of the Northern Pacific."}, {"n": "Presbyornithidae", "u": "/e/prehistoric-bird-families/presbyornithidae/", "s": "Extinct waterfowl with long legs, webbed feet, and a duck-like bill."}]