The keepers make their early morning breakfast rounds at the Heart of Africa exhibit.

Baby fever spreads, as a cheetah repopulation program goes into full effect.

The team hits the coasts for animal conservation, returning two rescued manatees to their native waters.

A young kangaroo named Fergus gets a gut check in the love department.

Doctors rush to save a cheetah; rescued macaws get a new life at the zoo; polar bear cubs go off the deep end.

Tiger cubs take on new turf; an orphaned baby manatee is rescued from the wild; a male oryx makes his move on a herd of females.

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.

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.

The Columbus Zoo and Aquarium makes room for three adorable new cheetah cubs.

A penguin stuck in molt for a year has hopefully seen the last of his bad hair days.

At the Columbus Zoo, keepers form extraordinary bonds with the animals in their charge.

Located just 10 miles from New York's Times Square, the Bronx Zoo is a recognized world leader in animal care and species conservation. It houses more than 6,000 animals and has a staff of 500-plus people dedicated to their care and well-being. Never before have camera crews been granted full access to the 265-acre campus, until production of the docuseries "The Zoo," which was filmed over eight months. The results are stories focusing on dozens of animals and experiences at the facility, and its critical mission to conserve wildlife around the world. Episodes also highlight various employees and how their expertise and skills help provide top-quality care for the animals.

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.

Carrying on late wildlife conservationist Steve Irwin's mission to bring people closer to animals is now the mission of his family. Terri, Bindi and Robert Irwin return to Animal Planet, giving viewers access to their wildlife adventures around the world and the amazing animals that continue to inspire their conservation efforts. The series features the family caring for more than 1,200 animals at the Australia Zoo; overseeing a world-class wildlife hospital, the largest of its kind in the world; and conducting high-level global expeditions.

From the creators of the real-time law enforcement series "Live PD" comes a version for animal lovers. It captures the fast-paced drama and intensity of a hospital procedural mixed with the unbreakable bonds between pets and their owners. Host Mark Steines ("Entertainment Tonight") is joined by veterinary experts in the studio to guide viewers through each episode, giving commentary on what is seen at featured animal hospitals and mobile vet clinics around the country. Cameras trail teams of emergency veterinarians and specialists as they work tirelessly through the night to save the lives of pets. The series also accompanies on-call vets to homes and farms to treat animals that are too sick or too big to travel.

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.

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.

Animal Planet adds to its staple of Colorado-based veterinary shows with one that follows the Henderson family practice in Lakewood. The Fox Hollow Animal Hospital was founded by Dr. Tony Henderson in 1996. It now includes Tony's sons Dr. Ross and Dr. Ryan and technician assistant Cole, plus the extended clinic family and numerous pets, including Tony's beloved golden retriever and sidekick, Lord Barrington. Drama and high stakes at the clinic with animals are part of the daily routine for this dynamic family, but so are jokes, laughter and love.