İngilizce devekuşu tanımı

'Merak Ettiklerimiz' forumunda HazaN tarafından 4 Mart 2011 tarihinde açılan konu

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    İngilizce devekuşu

    The ostrich, Struthio camelus, is a large flightless bird native to Africa (and formerly the Middle East) It is the only living species of its family, Struthionidae, and its genus, Struthio Ostriches share the order Struthioniformes with the Emu, kiwis, and other ratites It is distinctive in its appearance, with a long neck and legs and the ability to run at speeds of about 74 km/h (46 mph), the top land speed of any bird The ostrich is the largest living species of bird and lays the largest egg of any bird species

    The diet of the ostrich mainly consists of plant matter, though it also eats insects It lives in nomadic groups which contain between five and 50 birds When threatened, the ostrich will either hide itself by lying flat against the ground, or will run away If cornered, it can cause injury and death with a kick from its powerful legs Mating patterns differ by geographical region, but territorial males fight for a harem of two to seven females
    The ostrich is farmed around the world, particularly for its feathers, which are decorative and are also used for feather dusters Its skin is used for leather and its meat marketed commercially


    The ostrich was originally described by Linnaeus in his 18th-century work, Systema Naturae Its scientific name is derived from Latin, struthio meaning ostrich and camelus meaning camel, alluding to its dry habitat under its current binomial name

    The ostrich belongs to the Struthioniformes order of ratites Other members include rheas, emu, cassowaries, and the largest bird ever, the now-extinct Elephant Bird (Aepyornis) However, the classification of the ratites as a single order has always been questioned, with the alternative classification restricting the Struthioniformes to the ostrich lineage and elevating the other groups Presently, molecular evidence is equivocal while paleobiogeographical and paleontological considerations are slightly in favor of the multi-order arrangement


    Ostriches usually weigh from 63 to 130 kilograms (140–290 lb), although some male ostriches have been recorded with weights of up to 155 kilograms (340 lb) The feathers of adult males are mostly black, with white at the ends of the wings and in the tail Females and young males are greyish-brown and white The head and neck of both male and female ostriches is nearly bare, but has a thin layer of down

    At sexual maturity (two to four years old), male ostriches can be between 18 and 28 metres (59 and 92 ft) in height, while female ostriches range from 17 to 2 metres (56 to 66 ft) During the first year of life, chicks grow about 25 centimetres (98 in) per month At one year of age, ostriches weigh around 45 kilograms (99 lb) An ostrich can live up to 75 years

    Ostriches formerly occupied Africa north and south of the Sahara, east Africa, Africa south of the rain forest belt, and much of Asia MinorToday, ostriches prefer open land, and are native to savannas and the Sahel of Africa, both north and south of the equatorial forest zone In southwest Africa they inhabit the semidesert or true desert They rarely go above 100 metres (330 ft) The Arabian Ostriches in the Near and Middle East were hunted to extinction by the middle of the 20th century


    They mainly feed on seeds, shrubs, grass, and other plant matter; occasionally they also eat insects such as locusts Lacking teeth, they swallow pebbles that help as gastroliths to grind the swallowed food in the gizzard An adult ostrich typically carries about 1 kg of stones in its stomach Ostriches can go without water for several days, living off the moisture in the ingested plants However, they enjoy water and frequently take baths where it is availabledietary indiscretion), particularly in captivity where opportunity is increased Ostriches are known to eat almost anything (

    Ostriches are oviparous The females will lay their fertilized eggs in a single communal nest, a simple pit, 30 to 60 centimetres (12–24 in) deep and 3 metres (98 ft) wide, scraped in the ground by the male The first female to lay her eggs will be the dominant female, and when time comes to incubate, she will discard extra eggs of the weaker females, leaving behind about 20 Ostrich eggs are the largest of all eggs (and by extension, the yolk is the largest single cell, though they are actually the smallest eggs relative to the size of the bird The nest may contain 15 to 60 eggs, which are, on average,

    15 centimetres (59 in) long, 13 centimetres (51 in) wide, and weigh 14 kilograms (31 lb)

    They are glossy and cream in color, with thick shells marked by small pits The eggs are incubated by the females by day and by the male by night This uses the coloration of the two sexes to escape detection of the nest, as the drab female blends in with the sand, while the black male is nearly undetectable in the night The incubation period is 35 to 45 days Typically, the male will defend the hatchlings, and teach them how and on what to feed The survival rate is low for the eggs with an average of one per nest surviving Predators are hyenas, jackals, and vultures

    The life span of an ostrich is from 30 to 70 years, with 50 being typical
    Ostriches reared entirely by humans may not learn to direct their courtship behaviour at other ostriches, but instead may do so at their human keepers
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