Staff members devise a treatment for a newborn snow leopard cub struggling to walk; a group of surprisingly adorable Rodrigues fruit bats are trained for a big move.

The brown bears keep tearing up their exhibit, leaving zoo staff scrambling for a solution; Armani the aardvark gets treated for a tooth infection which has dampened her enthusiasm for digging; a group of burrowing owls prepare to move.

Iray, a red ruffed lemur, is rushed to the health center when keepers discover a wound on its leg; a new exhibit is built for the Pallas' cats, the original grumpy cats; seven baby turtles join the zoo's colony of an endangered species.

A team tests the problem-solving skills of lions against those of snow leopards; Willow, a young red panda, is having mysterious foot problems; the bird department awaits the gender reveal of two new adjutant stork chicks.

The last polar bear in New York City is showing his age so staff make sure he gets all the attention he needs; a trio of red ruffed lemurs prepare for their big debut; a new exhibit is constructed for the hellbender, a giant amphibian with a bad reputation.

To help love bloom between two kiwis, zoo staff build an elaborate hut into which they introduce a pair of potential mates; a King Cobra arrives at the zoo.

The future of the American bison depends on a high-stakes race across the country; the reptile staff have their hands full with a diamond rattlesnake that needs to be medicated orally; training a pair of cheetahs to walk the grounds of the zoo.

Leo, a snow leopard rescued from Pakistan, has trouble eating because of a broken canine; the bird department works feverishly to restore a beehive for the bee-eater birds; Ambassador Center staff work with an adorable Fennec fox named Charlie.

A tomistoma, a freshwater crocodilian, stops laying eggs and a team of keepers scrambles to treat her; the veterinary team has to rescue a baby antelope that isn't getting the care it needs from its mother; Mert the Goose takes a field trip.

Cardiologists try to determine why the geladas are experiencing a life-threatening heart condition; Nile crocodiles are shifted off exhibit for a maintenance project; the elephant shrews are breeding.

Crate training Nikita the Amur tiger in preparation for her move to Washington, D.C., proves challenging; an endangered Chinese alligator shows signs of being pregnant; staff prepare to release rare New England cottontail rabbits into the wild.

A new bison calf has a hard time keeping up with his mom; the bird department prepares a group of Von der Decken hornbill chicks for their move to the Minnesota Zoo; keepers at the Central Park Zoo hope the female snow monkeys accept a new male.

A trio of new penguin chicks are introduced to the pool for their first swim; family dynamics change when the mandrill monkey troop welcomes a new baby; a pair of king vultures are prepped for their big debut at the Queens Zoo.

Two adorable tiger cubs need to move to the adult exhibit; a silverback gorilla receives pioneering treatment to curb his worsening eyesight; a passionate keeper plays matchmaker to a peculiar pair of birds.

Zoo staff make the journey to east Africa to return to the wild thousands of toads they helped rescue from extinction; Utu, the test-pilot giraffe, tries out a new piece of equipment; the bird department works to save the lives of millions of birds.

Peaches, a 2-month-old warthog, charms his keepers while training to become an animal ambassador; a nervous one-horned rhino adjusts to her new exhibit; Willow, a red panda, shows signs of being pregnant.

A markhor goat gives birth to Andre, the biggest baby of the year; a baby bat requires human care before it can be reintroduced to its colony; confiscated lizards destined for the pet trade require urgent medical attention.

Andean bear Bouba returns from the National Zoo in Washington, D.C., to reunite with his mate, Nicole; a king cobra is treated; Blanche, a feisty alpaca, is due to give birth at any moment.

A 14-year-old otter is not its usual, energetic self; staff at the New York Aquarium move their sharks to a new exhibit; quirky capercaillies need help producing healthy chicks.

Beloved camel Max develops a large abscess on the top of his head; a marmot prepares for her first classroom visit as an ambassador animal; a peregrine falcon found at the base of skyscraper is brought to the zoo for a health check.

Zoo staff face unexpected setbacks weaning a bright sea lion pup off its mother's milk; the bird team steps in to support a rejected curassow chick; a squirrel monkey visits the dentist.

One of the largest and most popular zoos in the U.S., Ohio's renowned Columbus Zoo and Aquarium and its conservation park The Wilds, houses more than 10,000 animals on 12,000 acres. It's also the part-time home of beloved wildlife guru Jack Hanna, the zoo's director emeritus. Now, Nat Geo Wild is taking viewers inside the grounds and allowing them to experience what visitors can't: compelling, heartwarming stories, and behind-the-scenes moments and adventures. "Secrets of the Zoo" introduces both the animals and the legions of workers who create unforgettable connections between people and wildlife.

Chester Zoo is one of the most popular wildlife parks in Great Britain, attracting more than 1.8 million visitors annually. Through the use of cameras equipped with the latest technology, this program takes viewers behind the scenes of the zoo, capturing animal behavior close up, as well as the relationships the animals share with their keepers. Memorable scenes filmed over the course of the series include the birth of a baby giraffe, a pregnant viper getting X-rayed, chimps battling for dominance, and a red panda giving her partner the cold shoulder.

Making a lucrative living certainly isn't a motivating factor for wildlife caregivers. It's a profession that appeals to those with a strong will, a big heart, and a love of wild animals. In rural western Kentucky, the dedicated individuals featured in "Wild Bandits" rescue, rehabilitate and release injured, sick, and orphaned wild animals. State-licensed volunteers like Kristin Allen, who works for the Kentucky Department of Fish and Wildlife, answer emergency calls day and night, and coordinate with other rehabbers to provide the best care for each species. Despite the constant sacrifice of time, money and sleep, these caregivers make sure the animals come first -- with the ultimate goal of one day returning them back to the wild.

Rescuing animals in distress and finding them new homes is a cause near and dear to the hearts of countless humane organizations throughout the U.S. This Nat Geo Wild series focuses on the work of the Humane Society of the Pikes Peak Region, the largest nonprofit animal shelter in southern Colorado. With 5,400 square miles of rugged terrain in their jurisdiction, the Pikes Peak team works together to rescue and rehabilitate more than 40,000 animals each year. From thrilling animal rescues to medical emergencies, from interesting animals to heart-warming adoption stories, viewers watch incredible stories of nature, animals and the unwavering perseverance of officers and veterinarians.