We're in the midst of the Earth’s sixth mass extinction crisis. Harvard biologist E. O. Wilson estimated that 30,000 species per year (or three species per hour) are being driven to extinction.

Mexico's Gulf of California — one of the most biodiverse places on the planet — teems with 891 species of fish and a third of the world's cetacean species, including the smallest and most endangered ...

DESCRIPTION: The Andean flamingo is both the most rare and tallest of all six species of flamingo. It has a traditional pink coloration throughout its body, with a pale yellow face and black tail ...

DESCRIPTION: This sheep is a medium-sized bovid with a muscular body and thick neck. Males range between five and six feet in length and weigh up to 211 pounds; females are smaller, rarely weighing ...

Did your childhood include swallowtail and monarch butterflies fluttering through your neighborhood? Caterpillars chewing backyard leaves? Warm summer nights with fireflies blinking in the bushes? The ...

For every county in the United States, the map below shows information on all the animals and plants protected under the U.S. Endangered Species Act as threatened or endangered. To see the number of ...

DESCRIPTION: Pacific lamprey are slender, eel-like fish that are dark blue or brown in color and grow to about 30 inches long. They have lateral eyes, lack paired fins, and have no scales. Adult ...

Our planet now faces a global extinction crisis never witnessed by humankind. Scientists predict that more than 1 million species are on track for extinction in the coming decades. But there’s still ...

DESCRIPTION: The dugong is a marine mammal related to the manatee. It averages nine feet in length and weighs 550 to 1,000 pounds. The Okinawa dugong is slate gray to gray bronze in color and its tail ...

The largest of the true foxes, red foxes are also the most widespread, found across the entire northern hemisphere. But secretive Sierra Nevada red foxes — genetically and geographically distinct from ...

For arroyo toads, sand is de rigueur. Whether in a seasonal creek or during extended dry seasons, these toads endure harsh conditions by burrowing into sandy streamsides and sealing themselves within ...

Description: The tallest land mammal, with a neck as long as 6 feet, the giraffe is also well known for the unique brown and white pattern on its coat (“pelage”) and its lengthy eyelashes and legs.