132702 especies extintas

Mammals


Mammals: Mammals are warm blooded creatures who give birth to live young and produce milk. They are generally hairy, and live on land, with the exception of aquatic mammals such as whales and dolphins, and flying mammals such as bats.Examples: Indian elephant, human, bulldog, rat, cow, horse, red kangaroo, grizzly bear, spider monkey.Extinct Mammals: Wooly mammoth, megatherium, wooly rhino, quagga, Pyrenean Ibex, Red Colobus Monkey, Thylacine.


Birds


Birds: Birds are warm blooded creatures who are covered in feathers, produce eggs and fly. However, there are several species of flightless birds such as penguins and emus.Examples: Owl, duck, hummingbird, ostritch, parakeet, crow, vulture, falcon, puffin.Extinct Birds: Dodo, Labrador duck, Javanese lapwing, White-winged sandpiper, Rodrigues pigeon, Heath hen.


Reptiles


Reptiles: Reptiles are cold blooded creatures which are generally covered in scales and live in areas with warmer climates. Most reptiles reproduce by laying eggs, but some give birth to live young. Reptiles are also found in aquatic biomes, i.e. sharks and sea snakes.Examples: Rosy boa, iguana, sea turtle, chameleon, alligator, garter snake, hammerhead shark.Extinct Reptiles: Brontosaurus, Plesiosaur, Parasaurolophus, Ankylosaur, Round Island burrowing boa, Yunnan box turtle, Tonga ground skink.


Amphibians


Amphibians: Amphibians are cold blooded creatures who can live on land and in the water, most lay eggs, but some give birth to live young. Not to be confused with reptiles, amphibians do not have scales, and they breathe through their skin.Examples: Green frog, American toad, western rough skinned newt, spotted salamander, axolotl.Extinct Amphibians: Eryops megacephalus, Marbled toadlet, Vegas Valleyleopard frog, mountain mist frog, golden toad, Gastric-brooding frog.

Fish


Fish: Fish are cold blooded creatures that inhabit both fresh and salt water, and reproduce by laying eggs. Some fish, such as the sea perches of the Pacific coast, give birth to live young, while others, such as the minamitobihaze of the malaysian mangrove forest are amphibious. Examples: Tuna, salmon, manta rays, moray eels, perch, sturgeon, swordfish, pufferfish, piranha.Extinct fish: Dunkleosteus, Pucapampella, Helicoprion, thicktail chub, phantom shiner, stumptooth minnow, Maryland darter.

solution-


Cloning

Perhaps one of the most controversial issues of the new century is that of cloning. While scientists have been able to successfully clone animals, it remains to be seen how the genetic lineage of the subjects ill be altered. Already, we have heard reports that "Dolly", the cloned sheep, is weaker than the original, and has suffered through a series of illnesses, including arthritis. The issue of human cloning has also generated public outcry, with both left and right wing groups agreeing on a ban.One of the most popular arguments is the possibility that in the wrong hands, cloning technology could be used to replicate malevolent individuals such as Adolph Hitler. Hollywood fantasy, or possible reality? The blockbuster hit Jurassic Park, based on the Michael Crichton novel of the same name, introduced the theory that by using genetic material from extinct animals combined with that of amphibians (the only species of vertebrates able to regenerate lost limbs), scientists would be able to bring dinosaurs back to life.

biografía- http://www.extinctanimal.com/