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.