Animal extinction is caused by several factors including excessive hunting, environmental degradation, and habitat loss. Many species are currently endangered, such as the African elephant whose population has declined 25% in recent decades. Other critically endangered species include the Iberian lynx, Tasmanian devil, and Grevy's zebra whose habitats and food sources are threatened by human activity. Conservation efforts are needed to protect endangered animals and prevent further extinctions.

1. Animal Extinction

2. There are many contributing factors to the extinction of an entire species of animals. Excessive hunting, environmental degradation and property development on animal sanctuaries cause the extinction of animals . You need to use the power of the media and your commitment to protecting animals in order to prevent animal extinction … Curent Endangered Species

3. Mammals The African Elephant ( Loxodonta africana ) Occurs in some 37 countries in sub-Saharan Africa, and are found in dense forest, open and closed savannah, grassland and, at considerably lower densities, even in the arid deserts of Namibia and Mali.

4. . Across the continent, the total population is believed to have suffered a decline of approximately 25% between 1979 and 2007 .

5. Pere David's Deer ( Elaphurus davidianus) . Known in Chinese as Milu, their English name is derived from the French missionary Father Armand David . They were reintroduced into China in the late 1980s from captive animals bred in Europe; these reintroduced animals have been managed since then and are not considered as wild. The captive population in China has increased in recent years, and the possibility remains that free-ranging populations can be established sometime in the near future The last wild population is thought to have been eaten by troops during the Boxer Revolution at the turn of the 19th century.

6. The Iberian Lynx (Lynx pardinus ) Has a total population of only 84–143 adults, restricted to areas of Spain and Portugal, qualifying the species as Critically Endangered. The continued decline in the Lynx's population is due in part to the severe depletion of its primary prey, the European Rabbit (Oryctolagus cuniculus).

7. The Tasmanian Devil ( Sarcophilus harrisii ) The size of a small dog and found only on the Australian island state of Tasmania, the devil is the largest carnivorous marsupial in the world. The global population of this species has declined by more than 60 percent over the last 10 years due to a fatal infectious cancer.

8. Grevy's Zebra ( Equus grevyi) It is estimated to have declined by more than 50% over the past 18 years, and the current population has approximately 750 adult animals. The main reasons for the decline of this species are reduction of available water sources (for example, in the Ewaso Ng'iro River over-abstraction of water for irrigation schemes has reduced dry season river flow by 90% over the past three decades); habitat degradation due to overgrazing by domestic livestock, which are also out-competing Grevy's Zebra for access to food; hunting; and disease

9. The Caspian Seal ( Pusa caspica ) Its population has declined by 90 percent over the last 100 years due to unsustainable levels of commercial hunting, habitat degradation and pollution; it is still decreasing.

10. Birds The Mallee Emuwren ( Stipiturus mallee ) is an Endangered Australian species that is undergoing a very rapid population decline. Clearance of its habitat for agriculture and livestock grazing has resulted in its current fragmented range, but the greatest threat to this bird is large-scale wildfires. The population is estimated to be around 10,000 individuals, with less than 2,000 km2 of suitable habitat left. Immediate sensitive habitat management is needed to help slow the worrying declines of this species

11. The Slender-billed Vulture ( Gyps tenuirostris ) Was once a common species, but in Southeast Asia it declined through the latter half of the 19th century and the first half of the 20th century; it is now listed as Critically Endangered. A recent survey recorded small numbers in Myanmar; very sharp declines have been noted in the last few years in India and Nepal; it is now thought to be extinct in Thailand and Malaysia, and the only recent Southeast Asian records are from Cambodia and southern Laos. By mid-2000, Gyps vultures were being found dead and dying in Nepal and India, and major declines and local extirpations were reported. There is strong evidence that Gyps vultures are fatally susceptible to veterinary painkillers containing Diclofenac. East of India, the near-total disappearance of the species pre-dated the present crisis, and probably results from the rarity there of large wild mammals and human consumption of deceased livestock.

12. Reptiles The Radiated Tortoise ( Astrochelys radiata ) Historically this species has been quite abundant, often being found along roadways and has served as symbol of Madagascar's south. However, this is no longer the case; its range has contracted by one fifth over the last 25 years and the population is declining.

13. The Cuban Crocodile ( Crocodylus rhombifer ) Relatively small in size, it is also thought to be one of the more intelligent crocodiles. Its meat is used in restaurants and its skin for clothing. Hybridization with the American Crocodile (Crocodylus acutus), is a newly recognised major threat to the Cuban Crocodile, decreasing its genetic purity and already limited range .

14. Invertebrates The Peacock Parachute Tarantula ( Poecilotheria metallica) Is a very rare, Critically Endangered spider known from a single location in the Eastern Ghats of Andhra Pradesh, India.

15. The Squaretail Coral Grouper ( Plectropomus areolatus ) Fishes As a result of increasingly heavy fishing pressure at spawning aggregations, many have now disappeared from some countries .

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