Reaching up to 800 pounds and 8 feet tall when standing, grizzly bears boast tremendous size and physical strength and have almost no natural enemies. Or just one — humans. But we’ve proved formidable ...

The smallest gray wolf subspecies in North America, the Mexican gray wolf is also one of the rarest and most imperiled mammals on the continent. The U.S. Fish and Wildlife Service (and its predecessor ...

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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 ...

Can you think of a more destructive way to extract resources than blowing up a mountain? How about if the waste from doing it is dumped straight into mountain streams? Mountaintop removal is a radical ...

DESCRIPTION: Pangolins are mammals but are uniquely covered from head to tail with large, geometric scales made of keratin. Pangolins range in weight from just 4 pounds to a record 70 pounds.

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 ...

In the southwestern United States and northwestern Mexico lies a region boasting the highest biodiversity in inland North America. Isolated mountain ranges topped by 10,000-foot peaks rise from ...

Known for their 6-foot-long necks, distinctive patterning and long eyelashes, giraffes have always captured the human imagination. These amazing African animals have the highest blood pressure among ...

DESCRIPTION: Humphead wrasse are enormous reef fish, having been measured as long as seven feet and weighing up to 420 pounds. The wrasse has thick, full lips and a forehead hump that becomes more ...

The grizzly bear is so named because its hair is grizzled, or silver tipped, yet the name is commonly believed to be derived from “grisly,” meaning “horrible.” DESCRIPTION: A subspecies of brown bear, ...

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 ...