The adzebills ( genus Aptornis) were two closely related bird species, the North Island Adzebill (Aptornis otidiformis Owen 1844) and the South Island Adzebill (Aptornis defossor Owen 1871) of the extinct family Aptornithidae ( Mantell 1848). The family was endemic to New Zealand, has been placed, by various studies of morphology and DNA, variously close to and far off from the Kagu of New Caledonia, as well as the trumpeters in the order Gruiformes. Its morphological closeness to the kagu may be the result of convergent evolution, although New Zealand's proximity to New Caledonia and shared biological affinities (the two islands are part of the same microcontinent) has led some researchers to suggest they share a common ancestor from Gondwana. ...more on Wikipedia about "Adzebill"
Bullockornis, nicknamed the Demon Duck of Doom, is an extinct flightless bird that lived approximately 15 million years ago in what is now Australia. ...more on Wikipedia about "Bullockornis"
The Mauritius Dodo (Raphus cucullatus, called Didus ineptus by Linnaeus), more commonly just Dodo, was a metre-high flightless bird of the island of Mauritius. The Dodo, which is now extinct, lived on fruit and nested on the ground. ...more on Wikipedia about "Dodo"
Dromornithidae were a family of large, flightless birds that lived in Australia until the end of the Pleistocene, but are now extinct. They were long believed to belong to the order of Struthioniformes, but are now usually classified as a family of Anseriformes1. Their closest living relatives are waterfowl such as ducks and geese. The modern Latin name Dromornithidae derives from Greek dromaios (swift-running) and ornis, ornith- (bird). Additionally, the family has been called Thunder birds, giant emus, giant runners and the western Victorian Indigenous Australian mihirung. The name used in this article, dromornithids, is derived from the family name. ...more on Wikipedia about "Dromornithidae"
Elephant birds are an extinct family of flightless birds made up of the genera Aepyornis and Mullerornis. These large birds, which were native to Madagascar, have been extinct since at least the 16th century. Aepyornis was the world's largest bird, believed to have been over three metres (10 feet) tall and weighing more than half a tonne (500 kilograms, or 1,100 pounds). Remains of Aepyornis adults and eggs have been found; in some cases the eggs have a circumference of over one metre (three feet). Three species have been described; A. hildebrandti, A. medius, and A. maximus, but the validity of some is disputed, with some authors treating them all in just one species. Aepyornis was a ratite, related to the ostrich; it could not fly, and its breast bone had no keel. ...more on Wikipedia about "Elephant bird"
Gastornis is an extinct genus of large flightless birds that lived during the late Paleocene and Eocene periods of the Cenozoic. Gastornis lived in Europe, but it had an extremely close relative in North America; the North American bird is often called Diatryma, but experts now believe they both belong in the Gastornis genus. ...more on Wikipedia about "Gastornis"
Genyornis (Genyornis newtoni) was a genus of large, flightless bird that lived in Australia until about 50,000 years ago. Many species became extinct in Australia around that time, coinciding with the arrival of humans. ...more on Wikipedia about "Genyornis"
At 75 centimetres or 30 inches, the flightless Great Auk (Pinguinus impennis) was the largest of the auks. It was hunted for food and down for mattresses from at least the 8th century. It is classified as the only species in the genus Pinguinus. It was also known as "garefowl", from the Old Norse geirfugl, or "penguin" (see below). ...more on Wikipedia about "Great Auk"
The Laysan Rail was a tiny inhabitant of the North West Hawaiian atoll of Laysan. This small island was and still is an important seabird colony, and sustained a number of endemic species, including the rail. It became extinct due to habitat loss, feral rats, and the Second World War. ...more on Wikipedia about "Laysan Rail"
(Mancalla) The Mancallinae was a sub-family of prehistoric flightless auks that lived in California and Mexico during the Pliocene, Pleistocene, and Oligocene epochs. ...more on Wikipedia about "Mancalla"
Moa were giant flightless birds native to New Zealand. Ten species of varying sizes are known, with the largest species, the Giant Moa (Dinornis robustus and Dinornis novaezelandiae), reaching about 3 m (10 ft) in height and about 250 kg (550 lb) in weight. They were the dominant herbivores in the New Zealand forest ecosystem. ...more on Wikipedia about "Moa"
The Moa-nalos are an extinct group of aberrant ducks that used to live on the Hawaiian Islands in the Pacific. They were the major herbivores on the islands for the last 3 million years until they became extinct when humans first reached the islands. ...more on Wikipedia about "Moa-nalo"
The North Island Takahē, Porphyrio mantelli, is an extinct rail that was found in the North Island of New Zealand. ...more on Wikipedia about "North Island Takahe"
Phorusrhacoids were large carnivorous flightless birds that were the dominant predators in South America during the Cenozoic, 62-2.5 million years ago. They were 1-3 meters tall; Titanis walleri, one of the largest species, is known from North America, marking one of the comparatively rare examples where animals that evolved in South America managed spread north after the Isthmus of Panama landbridge formed. The ancestors of T. walleri have not been found; however, it is likely that more North American species await discovery. ...more on Wikipedia about "Phorusrhacoid"
Phorusrhacos was a genus of giant flightless predatory birds that lived in Brazil and Patagonia, containing a single species accepted to date: Phorusrhacos longissimus. ...more on Wikipedia about "Phorusrhacos longissimus"
The Plotopteridae were an family of flightless seabirds from the order Pelecaniformes. Related to the gannets and boobies, they exhibited remarkable convergent evolution with the penguins, particularly with the now extinct giant penguins. That they lived in the North Pacific, the other side of the world from the penguins, has led to them being described at times as the Northern Hemisphere's penguins, although one novel new theory suggests that this group is a link between the penguins and the Pelecaniformes. Their fossils have been found in California, Washington and Japan. They ranged in size from that of a large cormorant (such as a Brandt's Cormorant), to being 2 m long. They had shortened wings designed for underwater wing-propelled pursuit diving (like penguins or the now extinct Great Auk), a body skeleton similar to that of the darter and the skull similar to that of a sulid. ...more on Wikipedia about "Plotopteridae"
The Raphidae is a family of extinct flightless birds, part of the order Columbiformes, comprising the genera Pezophaps and Raphus. The former comprised the species Pezophaps solitaria (the Rodrigues Solitaire); the latter Raphus cucullatus (the Dodo). Recent genetic evidence tends to support the submergence of the family within the Columbidae. ...more on Wikipedia about "Raphidae"
The Réunion Sacred Ibis, Réunion Flightless Ibis (see below) or Threskiornis solitarius, is an extinct bird species that was native to the island of Réunion. It is probably the same bird discovered by Portuguese sailors there in 1613 and until recently assumed by biologists to be a member of the solitaire family and called the "Réunion Solitaire" (Raphus solitarius), classified as a relative of the Dodo. ...more on Wikipedia about "Réunion Sacred Ibis"
The Rodrigues Solitaire (Pezophaps solitaria) was a flightless member of the pigeon family endemic to Rodrigues, Mauritius. It was a close relative of the Dodo. ...more on Wikipedia about "Rodrigues Solitaire"
The Stephens Island Wren (Xenicus lyalli) is famous for being considered the only known species to be entirely wiped out by a single individual. The bird was a flightless, nocturnal native of Stephens Island, New Zealand and fed on insects. It was only seen alive by Westerners on two occasions before the entire population was killed by the lighthouse keeper's cat named Tibbles in 1894. It is the most well-known of the extremely few (five or fewer) flightless passerines known to exist in historic times, all of which were inhabitants of islands and are now extinct. The others were 2 or 3 relatives of Xenicus and the Long-legged Bunting from Tenerife. ...more on Wikipedia about "Stephens Island Wren"
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