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://study.com/academy/lesson/endangered-animals-facts-causes.html

What causes an animal to become an endangered species? In this lesson, you will learn about the various ways in which a species can become...

https://www.ck12.org/book/CBSE_Biology_Book_Class_XII/section/19.3/

Feb 18, 2016 ... It is critically endangered, mainly due to massive loss of habitat due to ... The present rate of extinction is between 100 and 100,000 species per ...

http://www.earthtimes.org/encyclopaedia/environmental-issues/endangered-species/

May 29, 2011 ... An endangered species is a group of organisms which is at risk of ... Habitat loss is by far the most widespread cause of species endangerment. ... This can also have a knock-on effect of removing the food supply of other ...

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

Aug 6, 2018 ... One of the most significant causes of endangered animals is habitat loss. While habitat may be lost ... Invasive species are one of the key biotic reasons for animals being endangered. ... The Effects of Animal Overpopulation ...

http://assets.press.princeton.edu/chapters/s5_8879.pdf

Allee effects. These factors cause a reduction in the growth rate of small populations as they decline. (e.g., via reduced survival or reproductive success).

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 extinction. ... of the ecosystem, because the effects will be felt throughout the food chain.

https://www.nwf.org/Educational-Resources/Wildlife-Guide/Threats-to-Wildlife/Invasive-Species

Approximately 42 percent of threatened or endangered species are at risk due to invasive species. ... Invasive species cause harm to wildlife in many ways.

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

Sep 26, 2018 ... ... are a number of factors that cause species to become endangered, ... groups work diligently to reverse the effects of human developments.

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 ...