Surgery on a silverback gorilla's broken canine reveals a more serious medical issue. Is love in the air for two Birds of Paradise, Glory and Holiday? And, dozens of venomous tarantulas keep the staff on their toes.

Max, a beloved camel, develops a large abscess on the top of his head. An adorable marmot prepares for her first classroom visit as an ambassador animal. And, a peregrine falcon found at the base of skyscraper is bought to the zoo for a health check.

Zoo staff face unexpected setbacks weaning a bright sea lion pup off her mother's milk. The bird team steps in to support a rejected curassow chick. And, a squirrel monkey pays a visit to the dentist.

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. And, confiscated lizards destined for the pet trade require urgent medical attention.

Jasmine, a 14 year-old otter, is not her usual, energetic self. The staff of the New York Aquarium undertake a massive operation to move their sharks to a brand new exhibit. And the quirky capercaillies need help producing healthy chicks.

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

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. And a pair of king vultures are prepped for their big debut at the Queens Zoo.

A baby warthog charms his keepers while training to be an ambassador.

Keepers introduce three gaur - a large, skittish species of cattle - to the rest of the herd. A sickly Sambar fawn is rushed to the health center. And, the bird department excitedly prepares for the arrival of great hornbills.

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

Andean bear Bouba returns from the National Zoo in Washington D.C. to reunite with his loyal mate Nicole. Vets exercise the utmost caution in treating a venomous king cobra. And Blanche, a feisty female alpaca, is due to give birth at any moment.

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

Cardiologists try to determine why the geladas are experiencing a life-threatening heart condition. Keepers shift the Nile crocodiles off exhibit for a maintenance project. And, after a shaky start, the elephant shrews are breeding.

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

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. And keepers at the Central Park Zoo hope the female snow monkeys accept a new male.

Max the Camel faces new challenges as he ages. The Zoo prepares to give an injured turkey vulture a permanent home, but after healing, there may be a change of plan. Willow the Red Panda gives birth to two baby cubs.