Endangered Species 101
List of Endangered Bird and Mammal Species in the United States
An alphabetical list of animals protected by the Endangered Species Act.
What Does Endangered Mean?
This article defines endangered species, explains what makes an animal or plant endangered, and introduces the IUCN Red List.
What Causes Species to Become Endangered?
Learn about the primary reasons why species become endangered.
Endangered Species as Sports Team Mascots
Learn about six endangered species that have been chosen to represent sports teams around the world.
Foreign Species Protected by the U.S. Endangered Species Act
The Endangered Species Act helps protect wildlife beyond U.S. boundaries.
The World's Most Endangered Frogs
Over 400 of the world's frog species are critically endangered.
Endangered Mammals of China
A list of all the at-risk mammals in China.