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A species is extinct in the wild when it only survives in cultivation (plants), in captivity (animals), or as a population well outside...

1) Population reduction rate A critically endangered species’ population has declined between 80 and 90 percent. This decline is measured...

1) Population reduction rate A species is classified as endangered when its population has declined between 50 and 70 percent. This...

The definitions of the three threatened categories (vulnerable, endangered, and critically endangered) are based on five criteria:...

The International Union for Conservation of Nature (IUCN) keeps a “Red List of Threatened Species.” The Red List defines the severity and...

An endangered species is a type of organism that is threatened by extinction. Species become endangered for two main reasons: loss of...

One thing we humans fail at is seeing the big picture. We are often blind to the interconnectedness of everything that supports life, a...

In the past, most extinctions were due to natural causes. In fact, extinction is a naturally occurring phenomenon that occurs at a rate...

The Red List The IUCN Species Survival Commission hosts a separate website for their Red List of Endangered Species providing taxonomic,...