Selasa, 08 Februari 2011

10 animals in the world that has been extinct existence

10.burung dodo become extinct since the 17th century





Dodo (Raphus cucullatus) is a flying bird that lived on the island of Mauritius. Related to pigeons and doves, it stood about one meter (three feet), lived on fruit and nested on the ground. Dodo has been extinct since the 17th century mid-to-end.

It is usually used as the archetype of extinct species because extinction occurred during recorded human history, and directly attributable to human activities. Adjective phrase "as dead as a dodo" means undoubtedly and unquestionably dead. Verb phrase "to go way of the dodo" means to become extinct or obsolete, to fall from common usage or practice, or become a thing of the past.

9.cave lion: lion terbersar in the world (extinct 2,000 years ago)


Cave lion, also known as European or Eurasian cave lion, is a subspecies of lion known from fossils of extinct and a variety of prehistoric art. This subspecies is one of the biggest lion. An adult male, found in 1985 near Siegsdorf (Germany), has a shoulder height of about 1.2 m long and 2.1 m without a tail, which is about the same size as a modern lion is very large. This man even exceeded by other specimens of the subspecies. Therefore this cat may have about 5-10% larger than modern lions. It apparently became extinct about 10,000 years ago, during the Wurm glaciation, though there are some indications it may have been there recently as 2,000 years ago, in the Balkans.


8.the great Auk (extinct 2,000 years ago)

The Great Auk is the only species in the genus Pinguinus, giant Auks flew in from the Atlantic, to survive until today, but extinct today. It is also known as garefowl, or penguins.


Standing about 75 cm or 30-34 inches tall and weighing about 5 kg, the Great Auk was the largest flying from Auks. It was white and glossy black fur. In the past, the Great Auk was found in large numbers on the outer islands of eastern Canada, Greenland, Iceland, Norway, Ireland and England, but eventually hunted to extinction. Equipment found in Floridan middens show that at least sometimes, the birds themselves that far south in the winter recently as in the 14th century.

7.Aurochs: a very large type of cattle (extinct since 1627)


One of the most famous animals in Europe, the aurochs or mismanagement (Bos primigenius) is a very large type of cattle. Aurochs evolved in India around two million years ago, migrated to the Middle East and further into Asia, and reached Europe about 250,000 years ago.

In the 13th century AD, the range of aurochs' is limited to Poland, Lithuania, Moldavia, Transylvania and East Prussia. The right to hunt large animals on land were restricted to nobles and gradually to the royal household. As the population of aurochs declined, hunting stopped but the court still required gamekeepers to provide open fields for the aurochs to graze in. The gamekeepers exempt from local taxes in exchange for their services and decisions made an aurochs hunt for the death penalty. In 1564, the gamekeepers knew only 38 animals, according to a survey of the kingdom. The last aurochs that were recorded live, women, died in 1627 in Forest Jaktorów, Poland. skull was later taken by the Swedish Army and now belongs to Livrustkammaren in Stockholm.



In the 1920s two German zookeepers, brothers Heinz and Lutz Heck, attempted to breed aurochs back into existence (see breeding back) from domestic cattle that their offspring. Their plans based on the conception that the species is not extinct as long as all its genes are still present in the population alive. The result is a type called Heck Cattle, 'recreated the Aurochs', 'Heck Aurochs', which bears a complete resemblance with what is known about the physiology of wild aurochs or

6.Caspian Tiger (extinct since 1970)


Caspian tiger or Persian tiger was the western subspecies of tiger, found in Iran, Iraq, Afghanistan, Turkey, Mongolia, Kazakhstan, Caucasus, Tajikistan, Turkmenistan and Uzbekistan until it apparently became extinct in the 1970s. Of all the tigers known world, the Caspian tiger was the third largest.

Body subspecies is quite stocky and elongated with strong legs, big wide paws and unusually large claws. Ears are short and small, and give the appearance that without hair on end. Around the Caspian tiger was supported cheek hairy and the rest from a long, thick fur. Staining was similar to that of the Bengal tiger.
Caspian is very large male tiger and 169-240 kg weight. Women are not large, weighing 85-135 kg. There are still occasional claims of the Caspian tiger in sight.

5.Rusa Ireland: the largest deer that ever lived (extinct about 7,700 years ago)

The Elk or Giant Deer, was the largest deer that ever lived. He lived in Eurasia, from Ireland to east of Lake Baikal, during the Late Pleistocene and early Holocene. The latest known remains of species have been carbon dated to about 5,700 BC, or about 7,700 years ago. Giant Deer is famous for the size of weight (about 2.1 meters or 7 feet tall at the shoulder), and in particular to have the largest antlers of any known cervid (a maximum of 3.65 meters/12 feet from tip to tip and weighing up to 90 pounds). 

 

Discussion of the causes of their extinction are still focused on the horn (not on their overall body size), which may be more due to its impact on the observer rather than real property. Some have been suggested by human hunting was a factor in the collapse of the Irish Elk as it is with many prehistoric megafauna, even assuming that the size of a big horn to limit movement of men through the forest area or that it was by some other means "maladaptation". But overhunting is equivocal evidence, and as a continental species, it will co-evolved with humans throughout its existence and may have adapted to their presence.

4.Steller 's Sea Cow: the defenseless beast (Extinct since 1768)

Formerly found near the Asiatic coast of the Bering Sea, was discovered in in 1741 by naturalist Georg Steller, who traveled with the explorer Vitus Bering. Sea cow grew up to 7.9 meters (25.9 ft) long and weighed up to three tons, much larger than the manatee or dugong. This looks somewhat like a large seal, but the forelimbs were sturdy two whale-like tail. According to Steller, "animals do not ever come out on the beach, but always stay in the water. His skin was black and thick, like the skin of an old oak ..., its head is proportional to the small body ..., do not have teeth, but only two white bones above-average one, the other below ". This is really tame, according to Steller.

Fossils indicate that Steller's Sea Cow formerly widespread along the North Pacific coast, reaching south to Japan and California. Given the speed with the last population was eliminated, the possibility that the arrival of humans in the region is another cause of extinction as well. There are still sporadic reports of sea animals such as cattle from the Bering area and Greenland, which has been suggested that small populations of animals can survive until now. It remains so far unproven.

3.tasmanian tiger (extinct sejak1936)


Tasmanian tiger is the largest known carnivorous marsupial of modern times. Originally from Australia and New Guinea, estimated to have become extinct in the 20th century. It is commonly known as the Tasmanian Tiger (because his back is patterned stripes), and also known as the Tasmanian Wolf, and colloquially the Tassie (or Tazzy) Tiger or simply the Tiger. This is the last surviving member of its genus, Thylacinus, although a number of special species have been found in the fossil record come back to the early Miocene.

Tasmanian tiger became extinct in mainland Australia thousands of years before European settlement of the continent, but survived in Tasmania together with a number of other endemic species like the Tasmanian Devil. Intensive hunting encouraged by the gift are generally blamed for the extinction, but other factors may have the disease, the introduction of dogs, and human encroachment into their habitat. Although officially classified as extinct, sightings are still reported. .

2.quagga

One of Africa's most famous extinct animals, the quagga was a subspecies of the plains zebra, which was once found in large numbers in South Africa Cape Province and the southern part of the Orange Free State. It is distinguished from other zebras by having the usual signs of life on the front of the body only. In the middle, the lines fade and the dark, inter-line space becomes more widespread, and the back is plain brown. The name comes from the Khoikhoi word for zebra and onomatope, which is said to resemble the quagga's call.

quagga was originally classified as individual species, Equus quagga, in 1788. Over the next fifty years or more, many other zebras described by naturalists and explorers. Due to the large variation in coat patterns (no two zebras are the same), taxonomists were left with a large number of described "species", and there is no easy way to find out which one is the right type, a subspecies, and the only natural variants. Long before the confusion was sorted out, the quagga was hunted to extinction for meat, hides, and to preserve feed for domesticated stock. The last wild quagga was probably shot in the late 1870s, and the last known specimen died in captivity on August 12, 1883 at the Artis Magistra zoo in Amsterdam.

Because of the confusion between different zebra species, particularly among the general public, the quagga had become extinct before it was realized that appear to be separate species. Quagga was the first extinct creature that its DNA studied. the latest genetic research at the Smithsonian Institution have shown that the quagga is not actually a separate species at all, but deviates from the plains zebra is very varied.

1. Tyrannosaurus Rex (extinct 65 million years ago)

Tyrannosaurus rex was one of the largest land carnivore of all time, measuring up to 43.3 feet long, and 16.6 ft tall, with an estimated mass of which lasted up to 7 tons. Like other tyrannosaurids, Tyrannosaurus is a bipedal carnivore with a large skull balanced by a long, heavy tail. Due to the large and powerful hindlimbs, Tyrannosaurus forelimbs were small and they retained only two digits.

Fossils of T. rex have been found in North American rock formations dating to the last three million years of the Cretaceous Period at the end of the Maastrichtian stage, approximately 68.5 to 65,500,000 years ago, but among the last dinosaurs to exist before the Cretaceous-Tertiary extinction event. More than 30 T. rex specimens have been identified, some of which are nearly complete skeleton. Some researchers have discovered soft tissue as well. The abundance of fossil material has allowed significant research in various aspects of biology, including life history and biomechanics

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