A gray whale treated some whale watchers to the show of a lifetime when it came up to the boat, laid on its side, and opened its mouth.

Wildlife photographer Erin Braaten captured the photos of a lifetime this week in Yellowstone National Park: a newborn white bison calf.

Watch the incredible moment an octopus changes color from stark white to bright orange-y red, caught on film in the U.K.

Watch a black bear vs. black bear fight caught on a trail camera in Colorado. Colorado Parks and Wildlife calls it “play.”

A video shows a deer swimming in the Pacific Ocean off the central coast of California. It’s a bizarre sight.

First cicadas, now Joro spiders? You’ve seen the headlines about “giant venomous spiders” invading the East Coast. Here’s are the facts.

A mountain lion called “P-77” recently gave birth to three female kittens in the Simi Hills of California. They are adorable.

Reader beware: The longnosed stargazer fish’s stare is about to live rent-free in your head forever. You’re welcome.

A mom and daughter were driving in Florida when they spotted a massive lizard that was definitely not supposed to be there.

Rare wild animals often gain a following of wildlife photographers and wildlife enthusiasts, like this white grizzly bear.