Environmental Science Resources

Endangered Species

Extinction and endangerment can occur naturally in the course of evolution. Since humans became the dominant species on the planet, however, the rate at which other species have become extinct has increased dramatically. At present, scientists believe extinctions caused by humans are taking place at 100 to 1,000 times nature's normal rate between great extinction episodes.

Take a closer look at 24 endangered plants and animals:

Entries are from the Endangered Animals & Habitats, Beacham's Guide to the Endangered Species of North America and Beacham's Guide to International Endangered Species.