on animal species can survive indefinitely on earth. Centuries ago species went extince from natural causes for example they were unable to adapt to bad weather and other diffcult condition.Howrver animals are now dying out faster than ever because of hunman activity.it is estimated that until the 18th century one species disappeared from the earth every four years.By the 19th century this had increased to one species per year By 1975 it was 1,000 species per year, and today animals are disappearing at the alaming rate of more than 40,000 species per year.
the international Union for Conservation of Nature(IUCN) has created a number of categories that decribe the danger level of animal species.
.species that are completely gone are called extinct for example dinosaurs and the dodo
. species that only live in zoos or on farms etc.,fall into the category extinct in thewild. One example is the Wyoming toad.
.A species is labeled critically endangered when its numbers are dangerously low. This means it is in imminent danger of dying out completely and needs protection in order to surviver. the Siberian tiger and and the snow leopard are two examples.
. species that have a high, but not immediate, risk of ying out are simply labeled endangered. The giant panda is afamous example.
.A vulnerble species is in less trouble that an endangered one but its numbers are still markedly declining. The cheetah and the African elephant are vulnerable species.
.Animal species that are considered of least concern aren't particularly endangered and have high numbers of individuals.
There are many factors that can caues an animal or plant species to become enddangered, and one big one is the destuction of their habitats.Deforestation and soil,air, and water pollution are usually the main culprits. For example the population of critically endangered Sumatran orangutans is now less than 10,000 on their home island of Sumatar, Indonesia, due to deforestation and farming.
Another cause of endangerment is from humans exploiting willd animals. Uncontrolled hunting of whales in the last centure for example resulted in many whale species becoming critically animal parts stems from their use in certain foods or medicines or their value sa decorative objects. For example the ivory tusks of and the price is hing enough yhat people risk being arrested and jailed to go after these animals.
Introducing a non-native species to environment can also cause species endangerment. A native species is one that develops naturally in a particular area and has done so for a long time. A non-native species might be introduced into a new environment by humans, either intentionally or by accident. The brown tree snake unkowingly brought by cargo ships stopping at Guam has managed to kill off ten of the eleven species of birds native to the island'sforests. In Florida, large pet snakes such as the anaconda and the python have been released into the large Everglades swamp. The snakes have thrived in their new environment, and now compete with and may soon overwhelm the swamp's alligators
Organizations such as the World Wilddlife Fund and the IUCN try to raise awareness of theeatened animals and plants. These organizations collaborate with government agencies to save theatened or endangered species and to make new laws that will protect them. But to really protect plant and animal species now and in the future, the public needs to be educated on the value of krrping these species alive.