Loss of Biodiversity is current issue from the result of destructive Human’s activities. It has endangered animals and led the current rate of species to extinction, which is at least 100–1000 times higher than the expected natural rate. If we don't protect these animals, soon they will go forever as history.

The protection of endangered species is done by The World Wildlife Fund. Their mission is to utilize the best conservation science available and work with people to find solutions to save the marvelous array of life on our planet. Conservation efforts have brought many animals back from the verge of extermination. It has helped to not only conserve rich and varied ecosystems but also delivered real benefits to local people through new livelihood opportunities and sustainable progress.

The most endangered animals list includes some of the most-loved animals on the planet. Here is the list, with information about the particular problems facing by each animal.

Tiger:

Tigers are the largest of all the Asian big cats, at the top the food chain, and are one of the most culturally important and beautiful animals on this planet. There may be only 3,200 tigers left in the wild according to new studies. Cutting down of forests and climate change are reducing the size of the tiger's natural habitat. Tigers are poached for their body parts, which are used in traditional Asian medicine, while skins are also highly prized. Additionally, sea level rise, due to climate change, threatens the mangrove habitat of a key tiger population in Bangladesh’s and India’s Sundarbans. If we do not respond to the troubles of wild tigers and the needs of the communities that share their home with tigers—most of which is outside protected wildlife areas – we will witness the loss of one of the world’s most irreplaceable natural wonders of our lifetime. The upcoming Chinese Year of the Tiger, started on February 2010, will mark an important year for conservation efforts to save wild tigers.

Polar Bear:

Polar bears are the world’s largest land carnivore, well equipped to deal with the harsh climate of the Polar Regions. The Arctic’s polar bears have become the iconic symbol of early victims of climate. Eskimo still hunt the polar bear for fur and meat and kill around 130 each year. According to scientists, if current warming trends continue these bears have a limited time on Earth. Loss of ice means polar bears have smaller hunting and breeding grounds, leading some experts to predict the species could be extinct within next century. WWF provides funds to do research by the world's foremost experts on polar bears to find out how climate change will affect the long-term status of polar bears. WWF also works to protect critical polar bear habitat by working with governments and industry to reduce threats from shipping and oil and gas development in the region and with local communities to reduce human-bear conflict in areas where bears are already stranded on land for longer periods of time due to lack of ice.

Pacific walrus:

The pacific walrus is another animal that could fall victim to melting ice-sheets due to climate change. Pacific walruses live in the Bering and Chukchi Seas. These animals also use floating ice for resting and raising their young, so loss of ice could dramatically affect their ability to survive. Pacific walrus is likely threatened by climate change. 200 dead walruses were speckled on the shore of the Chukchi Sea on Alaska's northwest coast. With Arctic ice melting, the Pacific walrus is experiencing habitat loss to the extent that in September 2009; the US Fish and Wildlife Service announced that adding the walrus to the Endangered Species Act may be warranted.

Magellanic Penguin:

Due to warming of the ocean penguin main source of food, fish have been displaced. Magellanic penguins are forced to swim farther to find food and make the survival more difficult. Around Rio de Janeiro, last year hundreds of Magellanic penguins washed up on beaches and many emaciated or dead. Currently the Magellanic Penguin is listed as near threatened. Scientists have speculated that changes in ocean currents or temperatures, which may be related to climate change, could have been responsible for their movement more than a thousand miles north of their traditional nesting area in the southern tip of Argentina. Twelve out of the 17 penguin species are currently experiencing rapid population decline.

Leatherback Turtle:

The world’s largest living reptile, leatherback turtle is currently facing extinction as their numbers continue to decline as a result of being accidentally caught and killed by fishing fleets. According to recent estimates the species of leatherback turtle is declining particularly in the Pacific. Only 2,300 adult females now remain, making the Pacific leatherback the world's most endangered marine turtle population. Scientists predict that the decline is due to the large numbers of adults being caught as bycatch and killed. The warming of the Atlantic beaches can also influence the turtle’s numbers because the temperature of the nest determines the sex of the turtles. The nest warming means that more male turtles are being born. WWF aims to conserve leatherback turtle migratory pathways - by working with fisheries to decrease bycatch, by protecting critical nesting beaches, and by raising awareness so that local communities will protect turtles and their nests.

Bluefin Tuna:

The large migratory fish bluefin tuna is found in the western and eastern Atlantic and the Mediterranean Sea. Bluefin tuna is the highest source of sushi. This giant tuna is widely used in sushi restaurants. The species at serious risk of extinction, if unsustainable fishing practices in the Eastern Atlantic and Mediterranean are not stopped. The WWF is pushing for a temporary ban on fishing, buying, selling or serving bluefin tuna to allow the fish a chance to recover and increase its numbers.

Mountain Gorilla:

Wars in Africa have shrunk the habitats of mountain gorillas. Preservation efforts have lifted the number of mountain gorillas slightly, but there are still only about 720 left. The decline is chiefly due to cutting of forest and poachers who kill the gorillas for meat, as trophies and to capture and sell the infants. More than 200 live in the Virunga National Park, located in Uganda. While the mountain gorillas other home, the Bwindi Dense Forest in Uganda, has experienced population increases of 12 per cent over the past decade. Despite this success, the mountain gorilla’s status remains fragile, and WWF is working to save the great ape’s forest habitat in the mountains of the heart of Africa.

Monarch Butterfly:

The monarch butterfly migrates from North America to Mexico to avoid the cold winter. Millions of butterflies make this journey and they are at risk of extremes of weather. A well preserved and sheltered high-altitude pine and fir forest is necessary for the survival of the monarchs which has been considered as an endangered biological phenomenon. The WWF are trying to establish a way to protect them and restore their wintering habitats. So butterflies are protected from extreme weather and other threats. WWF is also supporting local communities to establish trees nurseries that are reintroduced to the monarch butterfly reserve, creating at the same time new sources of income for the owners of the monarch forests.

Javan Rhinoceros:

Javan Rhinoceros is considered to be the most endangered large mammals in the world with only two populations existing in the wild, for a total number of less than 60 animals. Poachers hunt them to sell for use in traditional medicines and deforestation has brought this rhino to the brink of extinction.WWF has been involved in protection and conservation of the Javan rhino since 1998, supporting forest rangers to undertake increased patrolling and protection activities, conducting surveys of the rhino population, raising awareness of the importance of the rhinos to local communities, and supporting park management. Last month, highly skilled sniffer dogs were used to search for traces of the extremely rare and endangered Vietnamese Javan Rhinoceros, of which no more than a dozen are thought to exist. These samples will be analyzed to better understand the gender mix and whether this small population has a chance of survival.

Giant Panda:

To save pandas scientists have been working for decades but the numbers are declining, with only around 1600 remaining in the wild. The panda has been used by WWF as its official symbol since 1961 and actively working on panda protection for close to 30 years. Panda’s are slow at reproducing and appear to have a low sex drive, which could certainly contribute to their decline in numbers. Its forest habitat in the mountainous areas of southwest China has become bitty, creating a number of small and isolated populations. Recently, WWF has been helping the government of China to undertake National Conservation Program for the giant panda and its habitat. This program has made important progress. Over half of the habitat where pandas live is now protected, and corridors are being established to connect key panda populations. But the 1,600 remaining wild pandas are still living in over 20 geographically separate areas.

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