Preserve our wildlife

Essay by Kokopelli7481Junior High, 9th gradeB, October 2004

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Many years ago there was a bird, the passenger pigeon that was very plentiful.

When the flocks would fly, they covered the sky and nearly blocked out the sun.

People killed them, not for food, but for fun. They thought the bird would be here

forever. The last passenger pigeon died in a zoo in 1914. Black bears were abundant

in New Jersey. In the mid 1970's, they were nearly driven to extinction. Laws were

passed and the bear have made a comeback. When humans have taken actions that

harm the planet and the creatures living within it, the government must take action.

That is the case with the extinction of plants and animals. Why should they go


Over 34,000 plant species and 5,200 animal species around the globe are

threatened with extinction, and many thousands more become extinct each year

before biologists can identify them. The primary causes of species extinction or

endangerment are habitat destruction, commercial exploitation, damage caused by

nonnative plants and animals introduced into an area, and pollution.

Of these

causes, direct habitat destruction threatens the most species. As species evolve, most

adapt to a specific habitat or environment that best meets their survival needs.

Habitat disintegration has caused plant and animal species in the remaining islands

of habitat to lose contact with other populations of their own kind. This reduces

their genetic diversity and makes them less adaptable to environmental or climatic

change. These small populations are highly vulnerable to extinction. Since the 1600s,

worldwide commercial exploitation of animals for food and other products has

caused many species to become extinct or endangered. Wildlife trade involves the

capture of animals for pets, zoo specimens, and research subjects. The capture of

wild animals for commercial use has endangered many species. Other animals have

been killed...