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Argentavis was among the largest flying birds to ever exist, holding the record for heaviest flying bird, although it was surpassed in wingspan after the 2014 description of Pelagornis sandersi, which is estimated to have possessed wings some 20% longer than those of Argentavis. [1] [2]
Argentavis may have been an exception, as its sheer bulk would have made it a less effective hunter, but better adapted to taking over other predators' kills. As teratorns were not habitual scavengers, they most likely had completely feathered heads, unlike vultures .
The heaviest bird ever capable of flight was Argentavis magnificens, the largest member of the now extinct family Teratornithidae, found in Miocene-aged fossil beds of Argentina, with a wingspan up to 5.5 m (18 ft), a length of up to 1.25 m (4.1 ft), a height on the ground of up to 1.75 m (5.7 ft) and a body weight of at least 71 kg (157 lb).
Teratornis (Greek: "wonder" (teratos), "bird" (ornis) [2]) was a genus of huge North American birds of prey—the best-known of the teratorns—of which, two species are known to have existed: Teratornis merriami and Teratornis woodburnensis.
The Cerro Azul Formation (Spanish: Formación Cerro Azul), also described as Epecuén Formation, is a geological formation of Late Miocene (Tortonian, or Huayquerian in the SALMA classification) age in the Colorado Basin of the Buenos Aires and La Pampa Provinces in northeastern Argentina.
The largest known wild suid to ever exist was Kubanochoerus gigas, having measured up to 500 kg (1,100 lb) and stood around 1 m (3 ft 3 in) tall at the shoulder. [97] Megalochoerus could be similar in size, possibly weighing 303 kg (668 lb) or 526 kg (1,160 lb).
The great slaty woodpecker (Mulleripicus pulverulentus) of southeast Asia is the largest woodpecker certain to exist, with a weight of up to 500 g (1.1 lb) and a length of up to 0.58 m (1.9 ft). [129] Less well-known than the woodpeckers and toucans, barbets can range up to 273 g (9.6 oz) and 33 cm (13 in) in the great barbet (Megalaima virens).
Pelagornis sandersi comparison with the Andean condor (Vultur gryphus) and the wandering albatross (Diomeda exulans). The sole specimen of P. sandersi has a wingspan estimated between approximately 6.06 and 7.38 m (19.9 and 24.2 ft), [9] giving it the largest wingspan of any flying bird yet discovered, twice that of the wandering albatross, which has the largest wingspan of any extant bird (up ...