TV Guide National Geographic Wild Sunday

Dr. Pol tries to discover what's causing a large bull to limp around; Dr. Emily treats a calf that has an unusually swollen foot, with unexpected results.

The Pols need to make a coop for their flock of peafowl, but before they can, Dr. Pol has emergency surgery to perform on a workhorse that was hit by a car.

Dr. Pol and the cast reflect on their favorite moments from the last 24 seasons.

Experts examine why the ancient Egyptians abandoned the pyramids; archaeologists search for secrets after they discover an ancient tomb.

A male mandrill is introduced to a family of female mandrills by Beth, Erin and Kerri; Susan helps a Sumatran tiger take on a difficult challenge.

Aardvarks go on a blind date that boasts the potential to produce the park's first aardvark babies; a gigantic Nile crocodile's injured tail is evaluated.

A western lowland gorilla celebrates his birthday; a lioness receives medical attention after her caretaker notices a bump; a caretaker teaches two macaws.

Hartmann's mountain zebras arrive on the savanna at Disney's Animal Kingdom; babirusa pig Betty is introduced to babirusa pig Mentari.

A shark goes wild, an ape faces one of its fears, a rhino seeks a mate, and a hippo makes a friendly enemy.

Out at the Wilds, vets tag newborn Pere David deer; keepers at the markhor exhibit get ready to welcome a batch of tiny babies

Ducks, which are aquatic birds for the most part, are treated by the staff at the Columbus Zoo and Aquarium; bonus content is added.

The days until the spring season begins are counted down by the experienced staff members at the Columbus Zoo and Aquarium, a non-profit zoo.

A flock of flamingos, a type of wading bird, is treated by the members of the staff at the Columbus Zoo and Aquarium, a non-profit zoo near Powell, Ohio.

An Asian takin calf hangs on for dear life at the Columbus Zoo and Aquarium, a non-profit zoo near Powell, Ohio, and later, a grumpy tiger arrives at the zoo.

A 44-year-old orangutan has the biggest birthday celebration of the year at the Columbus Zoo and Aquarium thanks to the zoo staff.

Young wolf pups are cared for by the professional staff at the Columbus Zoo and Aquarium, a non-profit zoo located near Powell, Ohio.

Baby goats, flamingo chicks and a young gazelle are cared for by the staff at the Columbus Zoo and Aquarium, a non-profit zoo near Powell, Ohio.

A cheetah, the fastest land animal on the planet, in the care of the Columbus Zoo and Aquarium is treated by members of the staff.

A monkey shows its true colors and a huge female bison gets a medical check-up at the Columbus Zoo and Aquarium, a non-profit zoo near the city of Powell, Ohio.

Snake Shyam needs help rescuing a deadly Russell's viper from a motorbike; a King cobra in search of a mate comes too close to the village.

Si and Sioux battle the heat and cramped spaces to rescue a Houdini rat snake, a grumpy, deadly krait and the ultimate, two huge, feisty king cobras.

Snakes, elongated, legless, carnivorous reptiles of the suborder Serpentes, at the Columbus Zoo and Aquarium is cared for by the staff.

A cheetah, the fastest land animal on the planet, in the care of the Columbus Zoo and Aquarium is treated by members of the staff.

Baby goats, flamingo chicks and a young gazelle are cared for by the staff at the Columbus Zoo and Aquarium, a non-profit zoo near Powell, Ohio.

Young wolf pups are cared for by the professional staff at the Columbus Zoo and Aquarium, a non-profit zoo located near Powell, Ohio.