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Endangered species are animal popluations that are at risk of extinction. Natural extinctions do occur, but human beings play an integral role in animal extinction and preservation.
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Two fatherless male chicks are being raised in a program to save the California condor from extinction. How are such 'virgin' births possible?
By Jenny Graves
The pink Amazon river dolphin, like some mythical creature from another world, is a shockingly beautiful color, but it is also extremely endangered.
Sometimes organisms, thought to be long gone from the world, rise from extinction like Lazarus from the dead, though it is a rare occurrence.
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This long-fingered primate with the perpetually startled golden eyes is considered one of the most distinctive animals on Earth.
The queen conch, a symbol of the Bahamas, is prized all over the world for its meat and its beautiful shell. But too much love has led to a serious decline in its population.
By Alia Hoyt
The axolotl can regenerate virtually any of its limbs or organs and has a face that's totally irresistible.
Scientists finally find a mate for a captive Bolivian frog that was thought to be the last of his species.
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A new study reports that the U.S. Endangered Species Act has helped marine mammal and sea turtle populations to significantly regenerate.
Sure, he could pummel all his fellow beasts in a brawl, but could he stand the test of time?
By Robert Lamb
There is only one tiger species, but new research reports the existence of six subspecies — information that could help us save these dwindling predators.
Frogs are like the canary in the coal mine for the state of the environment. And the bad news is they are not doing well.
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Milkweed is the only thing a monarch butterfly eats. Their numbers are dwindling, but this common backyard weed could save them.
Scientists discovered some new chameleon species with some very colorful characteristics.
The Evolutionarily Distinct and Globally Endangered (EDGE) Reptiles List includes 100 reptiles, including the punk rock Mary River turtle, that have lineages dating back to the Age of Dinosaurs.
Only two female northern white rhinos remain after the passing of Sudan, the last male of its subspecies.
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DNA technology is helping to curtail the brutal trade in poached rhino horns.
By Carrie Tatro
Panda populations are flourishing, and that's good news. But with the threats of infrastructure and livestock, can that trend last?
After 42 years of protection, the Yellowstone grizzlies will lose their status. Critics worry the bears could become targets for trophy hunter.
People flock to zoos to see pandas, lions and monkeys — the ones often referred to as "charismatic megafauna." They also attract a lot of donations. But is there a downside to making some creatures the stars of the animal show?
By Alia Hoyt
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Farming, prey decline, illegal trading and legal hunting all threaten the charismatic but secretive big cats.
Social media couldn't save Cecil the Lion. But the outrage at his death may be helping save other endangered animals and species.
The coelacanth is a real-life case of the living dead (well, kind of). The massive prehistoric fish was close to being left for extinct — until one was found in 1938. What makes this ancient creature so significant?
The Gulf oil spill mutilated tons of habitat for innocent animals and compromised the health of so many others. Read about the Gulf oil spill and learn about its devastating effects.
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The Lehmann's poison frog is also one of the most endangered frogs in the world. Read on to learn more about the Lehmann's poison frog.
Meet giant pandas, Mei Xaing and Tian Tian. Learn how the crew at the National Zoo enrich Mei Xaing and Tian Tian's diets.