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The osprey is usually placed in a separate family (Pandionidae), as is the secretary bird (Sagittariidae), and the New World vultures are also usually now regarded as a separate family or order. Karyotype data [ 3 ] [ 4 ] [ 5 ] indicate the accipitrids analysed are indeed a distinct monophyletic group.
The osprey and owls are the only raptors whose outer toe is reversible, allowing them to grasp their prey with two toes in front and two behind. This is particularly helpful when they grab slippery fish. [26] The osprey is 0.9–2.1 kg (2.0–4.6 lb) in weight and 50–66 cm (20–26 in) in length with a 127–180 cm (50–71 in) wingspan.
Accipitriformes is one of three major orders of birds of prey and includes the osprey, hawks, eagles, kites, and vultures. Falcons (Falconiformes) and owls (Strigiformes) are the other two major orders and are listed in other articles.
Pandion is a genus of fish-eating bird of prey, known as ospreys, the only genus of family Pandionidae.Most taxonomic treatments have regarded this genus as containing a single living species, separated into subspecies and found worldwide near water, while some treatments recognize two living species, splitting off the eastern osprey (Pandion (haliaetus) cristatus) from Australia and southeast ...
Encyclopædia Britannica, Inc. is the company known for publishing the Encyclopædia Britannica, the world's oldest continuously published encyclopaedia. The company also owns the American dictionary publisher Merriam-Webster .
The pattern of scales on the legs (acrotarsi) is reticulated, and the toes are separated. But Vigors noted that only the black-winged kite had rounded undersides on the nails of its talons, a trait found in the osprey but not in any other raptors, and thus suggested a separation of Elanus into two sections.
The erection of nest platforms for great grey owls was pioneered by Robert Nero in central Canada in the 1970s. Nesting may occur from March to May. Unlike, for example, osprey or white storks, the great grey owl does not predictably re-use nest sites over consecutive years. Four eggs are the usual clutch size. Eggs average 42.7 mm (1.68 in ...
Osprey Osprey I (from 1970), Sport flying boat; Osprey Osprey 2 (from 1973), Sport amphibian; Monaghan Osprey (from 1973), glider; Osprey GP-4 (from 1984), a low-wing retractable gear aircraft of wood construction; Osprey GP-5 (late 1980's), a racing airplane designed by George Pereira; Paraplane PSE-2 Osprey (from 1990s), an American powered ...