https://www.nationalgeographic.org/encyclopedia/endangered-species/

Mar 17, 2011 ... An endangered species is a type of organism that is threatened by extinction. ... Habitat loss is the leading known cause of population decline.

https://www.epa.gov/endangered-species/learn-more-about-threatened-and-endangered-species

Feb 15, 2018 ... Endangered species are those plants and animals that have ... Species disappear because of changes to the earth that are caused either by ...

https://www.factmonster.com/math-science/biology/plants-animals/why-do-animals-become-endangered

Humans are largely responsible when animals become extinct, endangered or threatened. Here are some reasons why ... Endangered and Threatened Species .

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

Jul 27, 2018 ... What causes animals to become endangered? Causes of species endangerment are many, but conservation biologists recognize that multiple ...

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

Aug 6, 2018 ... One of the most significant causes of endangered animals is habitat loss. ... Invasive species are one of the key biotic reasons for animals being ...

http://idahoptv.org/sciencetrek/topics/endangered_species/facts.cfm

These groupings come from the 1973 Endangered Species Act. ... Development by humans can also impact a species, by causing changes in their physical ...

https://www.britannica.com/story/what-makes-a-species-endangered

Over 7,000 species around the world are considered endangered. ... disease, and loss of genetic variation are all causes of species decline and most often are a ...

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

Sep 26, 2018 ... There are a number of factors that cause species to become endangered, but human destruction of natural habits is the leading cause.

https://www.nwf.org/Educational-Resources/Wildlife-Guide/Understanding-Conservation/Endangered-Species

An endangered species is an animal or plant that's considered at risk of .... conversion of habitat to human uses and fragmentation of habitat caused by such  ...

https://www.amnh.org/explore/ology/earth/ask-a-scientist-about-our-environment/why-are-so-many-animals-endangered

Why are there so many endangered animals these days? – Frances ... causes a mass extinction, which is when a huge number of species disappear altogether.