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www.factmonster.com/.../why-do-animals-become-endangered

Humans are largely responsible when animals become extinct, endangered or threatened. Here are some reasons why animals become endangered: Destruction of Habitat. Humans destroy precious habitat--the natural environment of a living thing--when they fill swamps and marshes, dam rivers and cut down trees to build homes, roads and other developments.

www.thoughtco.com/how-species-become-endangered-1181928

Today, more and more animal and plant species are on the verge of extinction because of a variety of major factors that cause a species to become endangered, and as you might expect, humans play a role in quite a few of them.In fact, the biggest threat to endangered animals is human encroachment on their habitats.

www.wisegeek.com/why-do-animals-become-endangered.htm

Animals can become endangered for a number of different reasons, but many experts believe that loss of habitat is frequently the main cause. Pollution can also damage a population, as can overhunting and overfishing. In other words, the activities of human beings are the biggest problems. Predation ...

greentumble.com/10-reasons-why-species-become-endangered

Explore the 10 reasons why species become endangered. ... What causes animals to become endangered? Causes of species endangerment are many, but conservation biologists recognize that multiple forces drawn along with human activity reinforce one another to cause a species to diminish.

sciencing.com/causes-animals-becoming-endangered-6564385.html

Increasingly the activities of man have caused a large numbers of animals to become endangered. Small populations are extremely sensitive to the factors causing endangerment, whether one relies on the ordinary sense of the word or the endangered species definition embodied in federal law.

www.reference.com/science/animals-become-endangered-4ca0c...

Why Do Animals Become Endangered? Animals become endangered due to growing human population, destruction of their habitats, pollution and the introduction of other exotic species in the same region. Human exploitation of Earth's resources also contributes to the endangerment of animal species.

www.usgs.gov/faqs/why-do-animals-and-plants-become-endangered

Generally speaking, endangered species are those animals and plants that are in decline and may be in danger of extinction. A threatened species is one that is likely to become endangered within the foreseeable future.

www.answers.com/Q/Why_do_animals_become_endangered

Animals become endangered at different times, and for different reasons. Some animals that were endangered in the past have already become extinct, for example the dodo.

www.nationalgeographic.org/encyclopedia/endangered-species

An endangered species is a type of organism that is threatened by extinction. Species become endangered for two main reasons: loss of habitat and loss of genetic variation. Genetic variation is the diversity found within a species. It’s why human beings may have blond, red, brown, or black hair ...

www.wonderopolis.org/.../how-does-a-species-become-endangered

An "endangered" species is any species in danger of extinction through all or a significant portion of its range. A "threatened" species is any species that is likely to become an endangered species within the foreseeable future. The International Union for Conservation of Nature (IUCN) keeps track of endangered species around the world.