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The harpy eagle (Harpia harpyja) is a large neotropical species of eagle. It is also called the American harpy eagle to distinguish it from the Papuan eagle, which is sometimes known as the New Guinea harpy eagle or Papuan harpy eagle. [5] It is the largest bird of prey throughout its range, [6] and among the largest extant species of eagles in ...
Haast's eagle (Hieraaetus moorei) is an extinct species of eagle that lived in the South Island of New Zealand, commonly accepted to be the pouākai of Māori mythology. [2] It is the largest eagle known to have existed, with an estimated weight of 10–18 kilograms (22–40 pounds), compared to the next-largest and extant harpy eagle (Harpia harpyja), at up to 9 kg (20 lb). [3]
It is also known by several other names, including Papuan harpy eagle, New Guinea eagle, New Guinea harpy eagle, or kapul eagle, the latter name from the local name for a usually arboreal marsupial that the eagle is known to regularly hunt. [3] [4] This is an endemic species to New Guinea, and it can occasionally be found throughout the island. [1]
The fish eagles, booted eagles, and harpy eagles have traditionally been placed in the subfamily Buteoninae together with the buzzard-hawks (buteonine hawks) and harriers. Some authors may treat these groups as tribes of the Buteoninae; Lerner & Mindell [ 26 ] proposed separating the eagle groups into their own subfamilies of Accipitridae .
[4] [30] In all sea and fish eagles, the toes are relatively short and stout, with the bottom of the foot covered in spicules and the talons being relatively shorter and more strongly curved than in comparably sized eagles of forests and fields, such as the "booted eagle" group (i.e. Aquila) or "harpy eagles". All of these specializations ...
Clockwise from top left: Bald eagle (Haliaeetus leucocephalus), cinereous harrier (Circus cinereus), greater spotted eagle (Clanga clanga), harpy eagle (Harpia harpyja), secretarybird (Sagittarius serpentarius), osprey (Pandion haliaetus), slate-colored hawk (Buteogallus schistaceus), Galapagos hawk (Buteo galapagoensis), white-backed vulture (Gyps africanus) (center).
Projected from this comparison, the mean prey size for wedge-tailed eagles is estimated at 1,750 g (3.86 lb), similar but just slightly ahead of the Verreaux's eagle and some 14% ahead of the golden eagle global mean prey size. [53]
These figures put their talon size as around the same size as the largest golden eagles and half the size of a harpy eagle. [ 29 ] [ 30 ] Some captive crowned eagles have been credited with a hallux-claw length of up to 10 cm (3.9 in), although, much like a single report of captive harpy eagles with a 13 cm (5.1 in) hallux-claw, no such ...