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 giraffe journeys to New York from the Indiana Zoo; endangered ducklings are released; cloud rats.

The geladas are experiencing a heart condition; Nile crocodiles; elephant shrews are breeding.

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

A bison calf can't keep up with his mom; there is hope that 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.

A charismatic ostrich named Olga works to be reunited with her flock. Buster the squirrel monkey is introduced to the Zoo's troop of feisty females. A functionally extinct species of turtle finds new life, and everyone's favourite warthog is back.

The zoo anxiously awaits the arrival of a snow leopard called K2's fourth cub; the staff is pleased when a pair of Andean condors embrace their new enclosure, while a squirmy binturong fights his annual vaccination.

A rowdy, young markhor is injured and vets must treat his infected hoof. The TAB staff head to Manhattan to rescue a wallaby living in an apartment, while a fruit bat discovers how to spread her wings, and a trio of alligators move into their summer home.

A trio of abandoned puma cubs arrives at the zoo, while the staff grows concerned that Ella, the oldest rhino, is not acting like herself. Meanwhile, a Caribbean flamingo is born at the zoo after nearly two decades, and Otto the stallion makes his debut.

An okapi called Magani is ready to breed and is paired with veteran Kweli to learn the ropes. Lola the blue iguana plays hard-to-get when introduced to a potential mate, and anteater Velcro shows off her talents with a new tool.