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The largest species of this order of nocturnal birds is the neotropical great potoo (Nycitbius grandis), which can grow to a weight of 680 g (1.50 lb) and a height of 60 cm (2.0 ft). Heavier Caprimulgiformes have been recorded in juvenile specimens of the Australian tawny frogmouth ( Podargus strigoides ), which can weigh up to 1.4 kg (3.1 lb).
Steller's sea eagle is the largest bird in the genus Haliaeetus and is one of the largest raptors overall. Females vary in weight from 6.2 to 9.5 kg (14 to 21 lb), while males are rather lighter with a weight range of 4.9 to 6.8 kg (11 to 15 lb).
The species of Aepyornis are amongst the largest birds, with weights of 235 kilograms (520 lb) estimated for A. hildebrandti [2] and 275–1,000 kilograms (610–2,200 lb) for A. maximus, making it one of the largest, if not the largest bird to have ever lived, [10] [2] with the latter reaching 3 metres (9.8 ft) in height.
A portrait of the upland buzzard. This is the largest buzzard and the largest member of the Buteo in the world based on total length and wingspan. However, it is roughly equaled in bulk by the North American ferruginous hawk (Buteo regalis), which is also only marginally smaller going on mean standard measurements.
They are the largest birds in this family. Both extant species in the genus are native to the Southern Hemisphere. Giant petrels are extremely aggressive predators and scavengers, inspiring another common name, the stinker. [2] Seamen and whalers also referred to the giant petrel as the molly-hawk, gong, glutton bird and nelly. [3]
The northern giant hummingbird (Patagona peruviana) is the largest species of hummingbird and one of two species of the genus Patagona. [2]It and the sympatric southern giant hummingbird (P. gigas) were once considered the same species, i.e., the giant hummingbird, though some researchers have already classified them as different species or subspecies in the past.
The species is the largest Australian bird of prey and one of the largest eagles in the world. The female wedge-tailed eagle is one of the world's largest eagles. [25] Its nearest rival in Australia for size is some 15 per cent smaller linearly and 25 per cent lighter in weight. [8] As is typical in birds of prey, the female is larger than
Dromornis planei was a very large flightless bird, similar in height to an ostrich or emu but with a heavier build; the species is however exceeded in size by the largest of these "thunder birds" Dromornis stirtoni. [11] Its bill was curved and deep, the overall size of the head and skull was remarkably large. [10]