Watch the newest member of San Diego Zoo's reindeer herd explore the exhibit with mom.

Watch her explore the exhibit with mom Pumpkin and learn what makes these furry rodents unique.

She what makes her an integral member of the troop, from being both a surrogate mom and now a surrogate grandma.

Watch the youngest, and most curious baby in San Diego Zoo's nursery corral interact with her new playmates.

At Pittsburgh's PPG Aquarium, this 8-year-old turtle is getting a second chance.

On this fascinating island on the Great Salt Lake, see how fast and gracefully these rams can move on steep, rocky slopes.

Deep into the Alaka'i plateau on the island of Kauai, two species of birds are rapidly nearing extinction, with only a few nests remaining in the wild.

You won't see this in the wild.

A neonatal assistive care unit provides care for an 11-day-old female ring tailed lemur until she's able to be reunited with her mom.

Crows are incredibly smart birds, and it took no time for Layla to learn there's a special reward at the end of this puzzle.

See tiger cubs Moka and Rakan explore their new surroundings at the San Diego Zoo.

Sea otters have a very special coat that requires regular grooming to ensure the cold water doesn't get to their skin, and some need a little more help than others to keep it in check.

The Attwater's Prairie-Chicken may be the most endangered bird in North America, with very few left in the wild, but a conservation program at the Houston Zoo is working hard to ensure they don't go extinct.

Getting a glimpse of the newborn giraffe calf understandably brought big crowds.

Coatis, also known as coatimundis, are found in the southwestern U.S. and Central and South America.

Get to know this large marine mammal.

A major threat to these frogs is a fungus that's sweeping through Central and South America.

See over 900 adult Wyoming toads released, as part of efforts to recover the species that's been affected by a fungal disease that's impacting amphibians all over the world.

Males can weigh more than 2,000 pounds!

Ever heard the saying "busy as a beaver?" Just watch Justine in action.

See what tricks zookeepers employ to keep a giraffe calf focused on his bottle.

Learn how handlers at the San Diego Zoo were able to halter train this darling Okapi, a member of the giraffe family.

The lab was built to address the issues of imperiled butterflies in southern California, threatened by development.

Meet a strange-looking Australian bird with a big personality and a beak to match.