就是用英语介绍老鹰

就是用英语介绍老鹰
就是用英语介绍老鹰

就是用英语介绍老鹰
Eagles are large birds of prey which are members of the bird family Accipitridae,and belong to several genera which are not necessarily closely related to each other.Most of the more than 60 species occur in Eurasia and Africa.[1] Outside this area,just two species (the Bald and Golden Eagles) can be found in the USA and Canada,nine more in Central and South America,and three in Australia.
Eagles are differentiated from other birds of prey mainly by their larger size,more powerful build,and heavier head and bill.Even the smallest eagles,like the Booted Eagle (which is comparable in size to a Common Buzzard or Red-tailed Hawk),have relatively longer and more evenly broad wings,and more direct,faster flight.Most eagles are larger than any other raptors apart from the vultures.The species called eagle can range in size from the Spillovers serpent-eagles,which typically weigh about 500 grams (1.1 pounds) and measure 45 cm (18 in),to the 6.5-kg,1-meter Harpy Eagle,though the Philippine Eagle and the Steller's Sea-Eagle are of similar size.
Like all birds of prey,eagles have very large powerful hooked beaks for tearing flesh from their prey,strong muscular legs,and powerful talons claws.They also have extremely keen eyesight which enables them to spot potential prey from a very long distance.[2] This keen eyesight is primarily contributed by their extremely large pupils which cause minimal diffraction (scattering) of the incoming light.
Eagles build their nests,called eyries,in tall trees or on high cliffs.Many species lay two eggs,but the older,larger chick frequently kills its younger sibling once it has hatched.

In strict usage in Europe and Asia, to mean any of the species in the subfamily Accipitrinae, which comprises the genera Accipiter, Micronisus, Melierax, Urotriorchis and Megatriorchis. The large and ...

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In strict usage in Europe and Asia, to mean any of the species in the subfamily Accipitrinae, which comprises the genera Accipiter, Micronisus, Melierax, Urotriorchis and Megatriorchis. The large and widespread Accipiter genus includes goshawks, sparrowhawks , the Sharp-shinned Hawk and others. These are mainly woodland birds with long tails and high visual acuity, hunting by sudden dashes from a concealed perch.
More generally (especially in North America) to mean falcons or small to medium-sized members of the Accipitridae – the family which includes the "true hawks" (Accipiters) as well as eagles, kites, harriers and buzzards.
Loosely, to mean almost any bird of prey outside of the order Strigiformes (owls).

Immature Northern Goshawk with fresh killThe common names of birds in various parts of the world often use hawk in the second sense. For example, the Osprey or "fish hawk"; or, in North America, the various Buteo species (e.g., the Red-tailed Hawk, B. jamaicensis).
In February 2005, the Canadian ornithologist Louis Lefebvre announced a method of measuring avian "IQ" in terms of their innovation in feeding habits.[1] Hawks were named among the most intelligent birds based on his scale.
Hawks are widely reputed to have visual acuity several times that of a normal human being. This is due to the many photoreceptors in the retina (up to 1,000,000 per square mm for Buteo, against 200,000 for humans), an exceptional number of nerves connecting these receptors to the brain, and an indented fovea, which magnifies the central portion of the visual field.

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