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Birds of prey (raptors) are known to display patterns of sexual dimorphism. It is commonly believed that the dimorphisms found in raptors occur due to sexual selection or environmental factors. In general, hypotheses in favor of ecological factors being the cause for sexual dimorphism in raptors are rejected.
Velociraptor (/ v ə ˌ l ɒ s ɪ ˈ r æ p t ər, v ə ˈ l ɒ s ɪ r æ p t ər /; [1] lit. ' swift thief ') is a genus of small dromaeosaurid dinosaurs that lived in Asia during the Late Cretaceous epoch, about 75 million to 71 million years ago.
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 golden eagle is a very large raptor, 66 to 102 centimetres (26 to 40 in) in length. Its wings are broad and the wingspan is 1.8 to 2.34 metres (5 ft 11 in to 7 ft 8 in). [ 33 ] [ 15 ] [ 34 ] [ 35 ] The wingspan of golden eagles is the fifth largest among living eagle species. [ 15 ]
The Challenges Raptors Face. The wild is an unforgiving environment for raptors, with mortality rates in the first year of life reaching as high as 80 to 90 percent.
The gray hawk (Buteo plagiatus) or Mexican goshawk [2] is a smallish raptor found in open country and forest edges. It is sometimes placed in the genus Asturina as Asturina plagiata . The species was split by the American Ornithological Society (AOU) from the gray-lined hawk .
Cooper's hawk was the 7th most often recorded raptor at four migration sites along the Gulf Coast, being much more frequently identified in the site at Veracruz, Mexico than the ones in the United States, but showed an annual stability of numbers that many of the more numerous raptors (including sharp-shinned hawks) in passage did not. [148]
Front view of male, Valparai, Tamil Nadu, India In flight over Thane district, Maharashtra, India Taking off after drinking at a pond, Bandhavgarh, India The crested honey buzzard (Pernis ptilorhynchus) [3] is a bird of prey in the family Accipitridae, which also includes many other diurnal raptors such as kites, eagles, and harriers.