The dodo, which is also named Raphus cucllatus, is an extinct bird that has the disability in flying. Accordingly, dodos are very likely to be eaten by Dutch sailors as they are extremely easy to be caught. It is also mentioned that dodos became more and more scarce after the sailors have landed on the island in 1598. The fundamental reason that cause the extinction is due to the disability of dodos in flying. However, according to the paper researches done by the Oxford University of Natural History, it’s the animals the sailors brought with them that are named as one of the key reasons our hapless feathery friend saw his demise. Pigs, dogs and rats are all animals said to have developed a taste for dodo eggs; this introduction of such animals into a foreign ecosystem, combined with humans hunting and eating them, saw the delicate balance the dodo had enjoyed for so long destroyed. The species was soon cripplingly endangered. And as a result, it faded from existence.
Correspondingly, all other species that are extinct or endangered have particular reasons which lead to the situations. As the environment is constantly changing, species that do not get familiar with or evolve to fit in the circumstance will eventually be expunged from the nature. So far, human-beings have discovered several main reasons that cause the extinction and have exerted their effort on improving ecosystem, animals’ home.
Pollution has been affecting animals in various ways tremendously, which generally presents as a kind of natural disaster—acid rain. Acid rain will severely damage female fishes’ reproductive system, which leads to the disability of laying eggs. As a matter of fact, this kind of contamination created by nature paled in comparison to what human-beings have been doing to the environment. Human-beings generate great destruction and threat to animals’ lives, especially from water pollution. As we all know, water is the source of life. Nevertheless, quantities of waste such as syringes, cigarette lighters and tooth brushes are dumped into this precious source every day and have been found in the stomach of dead seabirds. Leatherback Turtles, confusing plastic bags with jellyfish, feed on these bags that block their digestive system; it is estimated that populations of this reptile have declined 60% in less than 20 years. Some 100 million tons of plastic waste float in the Pacific Ocean, forming an enormous soup of debris almost as large as the United States. A little of everything – including footballs, kayaks and LEGO blocks – can be found here. The United Nations Environment Programme (UNEP) affirms that plastic waste is responsible for the death of about a million birds and more than 100,000 sea mammals each year. Through the credible research, it can be clearly seen that human’s waste has led to one of the greatest factors that cause the massive mortality of animals.
Habitats, which ought to be the most fundamental element that provide animals food and safe shelter, has longly been damaging in various ways. Millions of species are added involuntarily into the list of the endangered merely because of the loss of habitats. For example, one kind of the circumstance can be a widespread wildfire, which is extremely dangerous and fatal. As any kinds of animals undergo such situation, they would suffer pain and even the corruption of the species. This, however, is a nature phenomenon which would has possibly out-broken at any time in the history. In contrast, human-beings actions may cause destruction to habitats to a greater extent, which can also be split into two parts. The first one is the urbanization, which has gradually been taking the space of animals away from their own. “For example, in Maryland, 10 years ago every new person added to the state accounted for the loss of 1/3 acre of land; now, every new person causes the loss of 2/3 acre.” People who pioneered and build houses and structures upon their habitats gradually robbed their land away. Secondly, another term called mass deforestation contribute significantly to the loss of habitat as well. As people’s endless desire to the wood of the forests, millions of hired workers cut down countless trees annually, which provides birds and other species shelters. “Eighty percent of Earth’s land animals and plants live in forests, and many cannot survive the deforestation that destroys their homes.”
Lastly, the essential reason that leads to the endangered animals should be the contemporary overhunting and overharvesting caused by human-beings. Every year thousands of animals are killed for food, precious value and illegal trading by some poachers.