Flowing through the arid Arizona-Sonora borderlands, the San Pedro River is a vital lifeline. This "damned miracle" is one of the Southwest's last undammed rivers, supporting over 80 mammal species—including jaguars and pumas—along with amphibians, imperiled yellow-billed cuckoos, 250+ migratory bird species, and unique native fish. Its incredible biodiversity demands protection.

However, the San Pedro is drying up. Unsustainable groundwater pumping by a growing population has caused base flows to decline by 67% since the 1940s, creating a significant annual water deficit. This crisis stems from unchecked population growth and a lack of effective water-conservation planning.

To help protect this critical ecosystem, join the Center for Biological Diversity's e-list of activists and animal lovers here.

Earlier this year, researchers off the North Carolina coast documented a rare deep-sea event.

They captured footage of a barracuda preying on an Atlantic midshipman, a burrow-dwelling fish.

Male greater sage grouse engage in a courtship display.

They inflate and bounce their gular sacs to attract females.

Birds do it. Bees do it. Even undulating groups of Sierra newts do it.

Following nature's lead, let's do it. Let's fall in love.

Make a difference for wildlife and the planet. Join the Center for Biological Diversity's e-list to connect with fellow activists, citizen scientists, and animal lovers.

Stay informed and take action. Sign up here: https://bit.ly/2qE6gBz

Scientists recently witnessed a brief but epic octopus battle within a shipwreck's hull, nearly 6,000 feet deep in the Gulf of Mexico.

Likely vying for territory in the sunken vessel, two octopuses engaged in a tentacle tug-of-war until the intruding one retreated.

If you love cephalopods and other wildlife, join the Center for Biological Diversity's e-list for activists and animal lovers: https://bit.ly/2qE6gBz.

Lion's mane nudibranchs are translucent, otherworldly, and beautiful sea slugs. These predators use flexible "oral hoods" to capture prey like jellyfish, zooplankton, and small fish. When necessary, they are also capable swimmers.

Beyond their unique hunting methods, these fascinating creatures produce sweet-smelling secretions, often compared to watermelon or other fruit. If you appreciate nudibranchs and other wildlife, join the Center for Biological Diversity's E-list of activists, citizen scientists, and animal lovers: Join Here.

Remote camera footage reveals Florida's vibrant wildlife, showcasing panthers, bears, river otters, deer, turkeys, and bobcats. The Sunshine State truly is wild.

Passionate about wildlife and wild places? Join the Center for Biological Diversity's e-list. Connect with activists, citizen scientists, and animal lovers by signing up here.

Ringtails, often mistaken for cats or lemurs, are actually related to coatis and raccoons. These adorable, nocturnal creatures are Arizona's official state mammal, even appearing on driver's licenses.

Small and undeniably cute, ringtails possess oversized eyes and ears, perfectly adapted for nighttime foraging. Their diverse diet includes fruit, lizards, insects, snakes, birds and their eggs, mice, and squirrels.

Footage by Russ McSpadden / Center for Biological Diversity.