The Zoo's huge male sea lion is in rut, and staff need to move the younger males before he becomes territorial; the veterinary team come up with a solution to repair Dinky the Flamingo's broken ankle; feeding a rock python proves challenging.

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.

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.

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.

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.

Keepers introduce three gaur, a large species of cattle, to the rest of the herd; a sickly sambar fawn is rushed to the health center; the bird department prepares for the arrival of great hornbills.

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.

Surgery on a silverback gorilla's broken canine reveals a more serious medical issue; love develops between two birds-of-paradise; dozens of venomous tarantulas keep the staff on their toes.

When keepers introduce two tigers as potential mates, the process proves bumpy; a pair of African porcupines arrive at the zoo, requiring delicate handling; a pregnancy check on a 3,000-pound rhino necessitates some highly specialized equipment.

A pregnant African wild dog has the staff anxiously preparing for the big day; zoo director Jim Breheny steps in to help a keeper learn how to handle a golden eagle; a new tree in Jungle World gives the gibbons a fresh world to explore.

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.

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 giraffe named Mashengo journeys from the Indiana Zoo to his new home in the Bronx; keepers hand-raise endangered ducklings and release them at the Central Park Children's Zoo; love is in the air for a pair of cloud rats.

The squirrel monkeys play hard-to-get with the Children's Zoo's keepers; a pair of Komodo dragons meet for the first time, with explosive results; the Inca terns prepare for their first big flight.

Trust and experience are put to the test when an elephant requires delicate veterinary treatment from her keepers; endangered pink pigeons need all the help they can get to produce offspring; Monty the adorable otter needs to visit the dentist.

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 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.

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 the animals' 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." The results are stories focusing on dozens of animals and experiences at the facility, and its critical mission to conserve wildlife around the world. This companion series, subtitled "Bronx Tales," presents footage not seen in original episodes.

"The Zoo: San Diego" provides a behind the scenes look at the daily lives of various species of animals and the teams that care for them. Featuring two parks, the San Diego Zoo and the San Diego Zoo Safari Park, as well as the San Diego Zoo Institute for Conservation Research, San Diego Zoo Global is home to more than 700 species and 6,500 animals. A wide range of animals are introduced, including pandas, giraffes, Galapagos tortoises, koalas, elephants, mountain lions, two baby cheetahs that are learning how to be ambassadors for their species and a flock of ostriches known as the "Spice Girls." Besides the animals, the keepers and veterinarians at both the Zoo and the Safari Park -- many of whom have dedicated their lives to caring for animals, discuss what it's like to be a part of this world-renowned zoo.

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.

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.

Inside the day-to-day life of the animals and caretakers of the Bronx Zoo.

The famed San Diego Zoo is the setting for this series that showcases different species of wild animals that reside at the facility and the dedicated staffers who care for them. Grizzly bears, rhinoceroses and even armadillos are among the creatures featured on "Wild World," which provides information about the creatures' living environments and offers key facts about them. The show, which is targeted at teenagers, also includes stories about zoo-enrichment programs that help animals initiate natural behavior.

"Get Wild" showcases some of the animals that can be seen at the San Diego Zoo, one of the most famous zoos in the world. The educational series offers information about the creatures who live at the facility, including their natural habitats and unique behaviors. Topics include experts who study the ways in which orangutans raise their young and an explanation of the panda's living patterns. The series also introduces viewers to animal enrichment programs, in which members of the zoo's staff try to duplicate an animal's habits that are unique to them in the wild.

Amanda Giese eased her troubled childhood by connecting with animals. They were her best friends, her "saving grace," she says. That connection continued into adulthood, leading her to start a nonprofit called Panda Paws Rescue, whose mission is to end homelessness, abuse and neglect of all animals. Alongside Amanda's kids, Jade and Beast, and partner Gary, the family cares for animals -- primarily dogs that others have given up on -- in need and helps them find loving forever homes. Those efforts are featured on hourlong episodes, including a large-scale rescue mission to save the lives of dozens of animals that have major medical or special needs.