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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.
The eastern osprey (Pandion haliaetus cristatus) is a diurnal, fish-eating bird of prey. ... The weight of the female is 1.2 to 1.6 kilograms, males are 0.9 to 1.2 kg.
The osprey, a single species found worldwide that specializes in catching fish and builds large stick nests. Owls are variable-sized, typically night-specialized hunting birds. They fly almost silently due to their special feather structure that reduces turbulence. They have particularly acute hearing and nocturnal eyesight.
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.
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.
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Cassowaries are ratites, meaning they are flightless. They’ve also earned the dubious distinction of being “the world’s most dangerous bird.” Its more famous flightless cousin, the emu, is ...
Birds are solely gonochoric, [100] meaning they have two sexes: either female or male. The sex of birds is determined by the Z and W sex chromosomes, rather than by the X and Y chromosomes present in mammals. Male birds have two Z chromosomes (ZZ), and female birds have a W chromosome and a Z chromosome (WZ). [77]