Rejoining the team for some post-rainy-season drama as they search for Ferinha, Fera and Badalo, whose tracking collars are missing; meeting a new biologist, who helps Lizzie recollar the jaguars.

Five desert lions come of age in the African Namib.

The story of five male cubs growing up on the Skeleton Coast of Namibia; the lions cover vast distances, thriving as nomadic hunters and becoming the youngest pride males ever to rule Namib's ancient desert realm; one brother sets off alone.

Leaving their native home in South Africa, seven lions are being transported to Akagera National Park, covering thousands of miles to the heart of Africa, in order to revive the local lion species.

A newborn wildebeest faces a terrifying ordeal when it's taken by a lioness. The predator doesn't kill the calf and, instead, takes care of the newborn for an entire day.

In a South African sanctuary, Liz meets a nine-year-old lion called Ricci whose teeth are in such rough shape he can't eat; specially trained vets use unique tools and slightly more anaesthetic than estimated on the wakeful patient.

Rejoining the team for some post-rainy-season drama as they search for Ferinha, Fera and Badalo, whose tracking collars are missing; meeting a new biologist, who helps Lizzie recollar the jaguars.

A newborn wildebeest faces a terrifying ordeal when it's taken by a lioness. The predator doesn't kill the calf and, instead, takes care of the newborn for an entire day.

In a South African sanctuary, Liz meets a nine-year-old lion called Ricci whose teeth are in such rough shape he can't eat; specially trained vets use unique tools and slightly more anaesthetic than estimated on the wakeful patient.

Three-year-old Wine ditches lessons to make a remarkable new friend, as she bonds with a young macaque; two refugees from a Thai circus, young mother Sampit and her son Sawadee, get a second chance at living semi-wild on a pre- release island.

Whale researcher, Nan Hauserat, is in the Cook Islands to research humpback whales.

A newborn wildebeest faces a terrifying ordeal when it's taken by a lioness. The predator doesn't kill the calf and, instead, takes care of the newborn for an entire day.

In July, Arctic ice sheets crash into the sea while an arctic fox hunts among the rocks. In Africa, herds wildebeest cross the croc-infested Mara river.

From the icy peaks of age-old mountain glaciers to the fog-shrouded canopies of Canada's only rainforest, it's the wettest place in North America.

The St. Louis Zoo caters to a wide range of tastes for some of the world's largest eaters, including an anaconda and hippos.

The keepers at the St. Louis Zoo make sure that every animal family gets the proper nutrition.

Hope learns all she can from a birds of prey rehab.

From the icy peaks of age-old mountain glaciers to the fog-shrouded canopies of Canada's only rainforest, it's the wettest place in North America.

The St. Louis Zoo caters to a wide range of tastes for some of the world's largest eaters, including an anaconda and hippos.

The keepers at the St. Louis Zoo make sure that every animal family gets the proper nutrition.

A family of wild dogs living in a corner of Zambia's Luangwa Valley.

A newborn wildebeest faces a terrifying ordeal when it's taken by a lioness. The predator doesn't kill the calf and, instead, takes care of the newborn for an entire day.

After the dry season lowers the waters, siblings Kimba and Maya risk crossing the river to search for their parents; they run the gauntlet of the densest populations of crocs and hippos in Africa.

During the last few weeks of the dry season, the prides stick close to the only available water in the river; in Luangwa, the scent of a hippo kill compels the Hollywoods to cross the river.

The dry season is approaching its end, and the MK pride faces its toughest moment yet; their matriarch and best hunter, Surabi, is gored by a buffalo and her survival hangs in the balance; one of the youngest members of the pride is lost and alone.

Leaving their native home in South Africa, seven lions are being transported to Akagera National Park, covering thousands of miles to the heart of Africa, in order to revive the local lion species.

Lizzie and veterinarian Joares scramble to collar more jaguars amid storms, floods, and power outages.

Big cat expert Giles Clark adopts jaguar cub Maya and hand-raises her at home while raising funds for wild cats; Giles has his hands full, improving the lives of the fifty cats that live there.

Maya grows up to be seven weeks old and is becoming determined and vocal; Giles feels overwhelmed about the enormity of what he has taken on with the sanctuary, but is paying close attention to Maya's health, in particular her eyesight.

Maya is ten weeks old and is starting to push the family to their limits; she wreaks havoc in the house, destroying the bookshelf, getting into the fridge and ripping up the sofa; she is also showing possessive behaviors with her toys.

Following two cheetah mothers - Savannah and her four cubs, in the Tswalu Kalahari Reserve, and Chili and her five kittens in the Great Karoo Wilderness - as they navigate a harsh environment, dangerous wildlife and dwindling prey.

Wildlife filmmaker Gordon Buchanan gets close to wild cheetah in the Kalahari, experiencing first-hand the very real dangers these big cats face.

Lizzie and veterinarian Joares scramble to collar more jaguars amid storms, floods, and power outages.

Following two cheetah mothers - Savannah and her four cubs, in the Tswalu Kalahari Reserve, and Chili and her five kittens in the Great Karoo Wilderness - as they navigate a harsh environment, dangerous wildlife and dwindling prey.

Wildlife filmmaker Gordon Buchanan gets close to wild cheetah in the Kalahari, experiencing first-hand the very real dangers these big cats face.

After weeks of battling a mysterious head infection, Erik joins the group two students; at forest school, the group three students enjoy a poolside classroom where Valentino proves he's more than just a class clown.

Hope's team struggles to help two rescued harp seals learn the natural behaviors they will need to survive in the wild.

Seeing the release of pythons and monkeys.

Whale researcher, Nan Hauserat, is in the Cook Islands to research humpback whales.

The jungle, underwater caves and lush everglades of the Yucatan shelter Mexico's largest predator, Morelet's crocodile.

The staff at the St. Louis Zoo deals with managing the nutritional needs of picky eaters.

Zoo keepers feed the minds of their hungry animals. Whether it's puzzles and piñatas, or honey tubes and herb gardens, food is the icing on the cake to prevent boredom.

Gators, tortoises and stunning seabirds of southwest Florida.

The jungle, underwater caves and lush everglades of the Yucatan shelter Mexico's largest predator, Morelet's crocodile.

The staff at the St. Louis Zoo deals with managing the nutritional needs of picky eaters.

Zoo keepers feed the minds of their hungry animals. Whether it's puzzles and piñatas, or honey tubes and herb gardens, food is the icing on the cake to prevent boredom.

Spotty the hyena must ascend to the leadership of the Chimbwe Clan in Zambia's Luangwa Valley.

In a South African sanctuary, Liz meets a nine-year-old lion called Ricci whose teeth are in such rough shape he can't eat; specially trained vets use unique tools and slightly more anaesthetic than estimated on the wakeful patient.

During spring on the Gomoti River, cheetah mother Phefo and lion mother Tshaba teach their cubs' survival skills; they protect their young from big male cats; lion king Molelo fights battles; leopard Senatia works to secure his legacy.

Tracking Molelo's pride, who are exhausted when the winter floods arrive and witnessing an encounter that gives leopard mum Sephiri a decision to make.

Liuwa Plains is a place of extremes. For half the year, it's a dry barren plain where only the toughest survive and for the other half, it's a paradise of waterholes.

A pride of lions roams the Luangwa Valley and encounters honey badgers, warthogs, hyenas and other fascinating animals.

The Onçafari team gets to know Aroeira, their newly collared female and takes a peek at Aurora's cub, Apolo; Badalo moves deeper into the flooded forest, where he puts Lizzie's game-changing research in jeopardy.

The filmmaker sheds light on the long-standing rivalry between lions and hyenas in hunting and how they survive the wilderness.

The Onçafari team gets to know Aroeira, their newly collared female and takes a peek at Aurora's cub, Apolo; Badalo moves deeper into the flooded forest, where he puts Lizzie's game-changing research in jeopardy.

Young orangutans who have lost their mothers to poaching and deforestation learn the skills they'll need to survive in the wild at a unique forest school.

The Onçafari team gets to know Aroeira, their newly collared female and takes a peek at Aurora's cub, Apolo; Badalo moves deeper into the flooded forest, where he puts Lizzie's game-changing research in jeopardy.

Attending a crabby shell swap, meeting a chimp's pet, and sizing up an otter kidnapper.

In the heart of central Mexico, lies Sierra Gorda, a region that is home to bobcats, pumas and flying squirrels.

Keepers dole out buckets of fresh fish for their sea lions and penguins and a bouquet of veggies for their century old tortoises.

Feeding critically endangered orangutans, cheetah and painted dogs.

Hope and Barry travel to Texas where not everyone agrees on how to help wildlife.

In the heart of central Mexico, lies Sierra Gorda, a region that is home to bobcats, pumas and flying squirrels.

Keepers dole out buckets of fresh fish for their sea lions and penguins and a bouquet of veggies for their century old tortoises.

Feeding critically endangered orangutans, cheetah and painted dogs.

An old Leopard struggles to find a meal while avoiding a pride of lions.

Following two cheetah mothers - Savannah and her four cubs, in the Tswalu Kalahari Reserve, and Chili and her five kittens in the Great Karoo Wilderness - as they navigate a harsh environment, dangerous wildlife and dwindling prey.

Wildlife filmmaker Gordon Buchanan gets close to wild cheetah in the Kalahari, experiencing first-hand the very real dangers these big cats face.

The lions of Tanzania are the only cat species to live in groups; tiny rusty spotted cat of Sri Lankais 200 times smaller than a lion but just as curious.

Following the nocturnal pursuits of the tiny black-footed cat in South Africa that stakes its claim to the title of the world's deadliest.

Follow a young tiger in India that has been forced out of its home territory by another male and has to struggle for survival.

Follow two families of cheetahs struggle against heat, starvation and predators on the Serengeti.

When the all-female Hollywood pride encounters the Nomads, a new pride of rival males, they might have found the answer to their mating dry spell.

An attack leaves matriarch Ava incapacitated; Sam finds a tiny hyena cub all alone; the hyenas and the MK pride battle over a buffalo; Nathan discovers the MKs are hiding more cubs.

Follow two families of cheetahs struggle against heat, starvation and predators on the Serengeti.

A group of four young lions search for a pride to take over on the western bank of the Luangwa River.

Young orangutans who have lost their mothers to poaching and deforestation learn the skills they'll need to survive in the wild at a unique forest school.

A look at snow leopards in the central mountains of the Tibetan Plateau.

Follow two families of cheetahs struggle against heat, starvation and predators on the Serengeti.

Discover how weirdness is baked into some animals' DNA from birth; check out the bowerbird's mate-attracting dance moves, the Christmas Island crab's traffic-dodging prowess and the sockeye salmon's uphill swimming skills!

Costa Rica is a world of its own; a tropical corridor squeezed between two great oceans, powered by rivers and volcanoes; its volcanoes erupt and deposit minerals into the soil, making the land fertile and creating the country's rich bio-diversity.

Keepers can't let their guards down when it comes to feeding tigers, sun bears or rhinos.

Animals - and a plant - that use stench to survive.

Traveling to San Diego, Hope and Allison look to learn how to handle huge caseloads and dangerous animals.

Costa Rica is a world of its own; a tropical corridor squeezed between two great oceans, powered by rivers and volcanoes; its volcanoes erupt and deposit minerals into the soil, making the land fertile and creating the country's rich bio-diversity.

Keepers can't let their guards down when it comes to feeding tigers, sun bears or rhinos.

Animals - and a plant - that use stench to survive.

An aging leopard in Zambia is challenged by a younger female.

Follow two families of cheetahs struggle against heat, starvation and predators on the Serengeti.

In South Africa's Greater Kruger Park, a lion cub finds her place in the wild under the guidance of a devoted father, a fierce mother and a playful sister.

Cheetah cub Usana is born with the odds stacked against her, but she is lucky to have an amazing mother that will stop at nothing to keep her cubs safe.

Test limits with jaguar cub Frida, who's honing her survival skills in Brazil's Caiman Lodge Reserve.

Big cat expert Giles Clark adopts jaguar cub Maya and hand-raises her at home while raising funds for wild cats; Giles has his hands full, improving the lives of the fifty cats that live there.

Maya grows up to be seven weeks old and is becoming determined and vocal; Giles feels overwhelmed about the enormity of what he has taken on with the sanctuary, but is paying close attention to Maya's health, in particular her eyesight.

Maya is ten weeks old and is starting to push the family to their limits; she wreaks havoc in the house, destroying the bookshelf, getting into the fridge and ripping up the sofa; she is also showing possessive behaviors with her toys.

A newborn wildebeest faces a terrifying ordeal when it's taken by a lioness. The predator doesn't kill the calf and, instead, takes care of the newborn for an entire day.

Follow two families of cheetahs struggle against heat, starvation and predators on the Serengeti.

Follow two families of cheetahs struggle against heat, starvation and predators on the Serengeti.

A look at snow leopards in the central mountains of the Tibetan Plateau.

A look at snow leopards in the central mountains of the Tibetan Plateau.

A newborn wildebeest faces a terrifying ordeal when it's taken by a lioness. The predator doesn't kill the calf and, instead, takes care of the newborn for an entire day.

Follow a young tiger in India that has been forced out of its home territory by another male and has to struggle for survival.

A look at snow leopards in the central mountains of the Tibetan Plateau.

A look at snow leopards in the central mountains of the Tibetan Plateau.

Follow a young tiger in India that has been forced out of its home territory by another male and has to struggle for survival.

The fate of several graduates awaits the next round of wild releases; runaway Zalipa is found, but her partner in crime, Tulia, is still missing; baby Clarita has a complete meltdown as the vets perform surgery on her mother.

A look at the extraordinary wildlife, landscapes and people of the Amazon, the world's greatest river; from boiling streams and transparent lagoons, to pink river dolphins and riotous river carnivals, its great size hides spectacular secrets.

Juggle the demands of caring for sick koala joeys with vet Claire; see what it takes to save a squirrel glider caught in barbed wire; take care of an exhausted owl; get a big surprise when vet Tim X-rays a turtle that was struck by a car.

The team saves a massive sea lion caught in a plastic noose; a visit to the Rescue Centre where a harbor seal pup may lose its eyesight; a baby sea otter needs a risky but life-saving surgery.

Bizarre birds have various adaptations.

Some survival adaptations make creatures ugly.

Incredible stories of wildlife rescue and rehabilitation.

The team saves a massive sea lion caught in a plastic noose; a visit to the Rescue Centre where a harbor seal pup may lose its eyesight; a baby sea otter needs a risky but life-saving surgery.

Bizarre birds have various adaptations.

Some survival adaptations make creatures ugly.

The team makes the final attempt to reunite reluctant mother Dilla with her new baby Delilah; Clara and Clarita are on their final journey to freedom when a dangerous flood stops them in their tracks and threatens everyone.

The team saves a massive sea lion caught in a plastic noose; a visit to the Rescue Centre where a harbor seal pup may lose its eyesight; a baby sea otter needs a risky but life-saving surgery.

Hippos, crocodiles, and other creatures call the waterways of Africa home.

The creatures of the wetlands.

An international team of scientists investigates overfishing and how close we are to a global crash in fish populations.

South Cuba's remarkable coral reefs have been unexplored for over 50 years.

Bone up on outdoor skills as Winston and the X girls move into their new fresh-air enclosure; witness Yasmine and Yara's kindergarten power struggle.

Juggle the demands of caring for sick koala joeys with vet Claire; see what it takes to save a squirrel glider caught in barbed wire; take care of an exhausted owl; get a big surprise when vet Tim X-rays a turtle that was struck by a car.

Skin is the external barrier between animals and the outside world.

Wading into wetlands, where trees and water meet to nurture new life; diving into an underwater forest that protects young fur seals; visiting a mangrove sanctuary where a curious band of aquatic misfits hides out; meeting some real-life swamp monsters.

Masai Mara is an extraordinary documentary on the everyday fight for survival of one of the planet's wildest locations. The consistently fragile balance of power between predator and prey and the rule of the Law of Nature.

Skin is the external barrier between animals and the outside world.

Wading into wetlands, where trees and water meet to nurture new life; diving into an underwater forest that protects young fur seals; visiting a mangrove sanctuary where a curious band of aquatic misfits hides out; meeting some real-life swamp monsters.

Masai Mara is an extraordinary documentary on the everyday fight for survival of one of the planet's wildest locations. The consistently fragile balance of power between predator and prey and the rule of the Law of Nature.

The team makes the final attempt to reunite reluctant mother Dilla with her new baby Delilah; Clara and Clarita are on their final journey to freedom when a dangerous flood stops them in their tracks and threatens everyone.

Skin is the external barrier between animals and the outside world.

Wading into wetlands, where trees and water meet to nurture new life; diving into an underwater forest that protects young fur seals; visiting a mangrove sanctuary where a curious band of aquatic misfits hides out; meeting some real-life swamp monsters.

Masai Mara is an extraordinary documentary on the everyday fight for survival of one of the planet's wildest locations. The consistently fragile balance of power between predator and prey and the rule of the Law of Nature.

Battling wind and waves to find a sea lion trapped in a plastic ring; visiting a rescue centre, where over 80 orphan seals must be fed several times a day to prepare for release into the wild; an Amazonian duck gets a miraculous operation.

Animals that employ trickery: stick bugs, lion fish, emperor scorpions, and chameleons.

Recent research into bird-like qualities of dinosaurs.

It is Hope's open house and with it brings incredible releases; Hope hears news that will change everything.

Battling wind and waves to find a sea lion trapped in a plastic ring; visiting a rescue centre, where over 80 orphan seals must be fed several times a day to prepare for release into the wild; an Amazonian duck gets a miraculous operation.

Animals that employ trickery: stick bugs, lion fish, emperor scorpions, and chameleons.

Recent research into bird-like qualities of dinosaurs.

An inside look at the Nyaru Menteng Rescue Center in Borneo to explore how the orangutan school curriculum works, from nursery through graduation.

Battling wind and waves to find a sea lion trapped in a plastic ring; visiting a rescue centre, where over 80 orphan seals must be fed several times a day to prepare for release into the wild; an Amazonian duck gets a miraculous operation.

Jean Du Plessis takes a trip through the Serengeti with migrating wildebeest.

Jean witnesses how infant calves fare against the predatorial lions and crocodiles of the Mara.

Jean visits Tanzania's Ngorongoro Crater, home to the highest concentration of mammals in the world.

Jean climbs through Mount Killimanjaro's five different climates.

Skin is the external barrier between animals and the outside world.

Wading into wetlands, where trees and water meet to nurture new life; diving into an underwater forest that protects young fur seals; visiting a mangrove sanctuary where a curious band of aquatic misfits hides out; meeting some real-life swamp monsters.

Masai Mara is an extraordinary documentary on the everyday fight for survival of one of the planet's wildest locations. The consistently fragile balance of power between predator and prey and the rule of the Law of Nature.

Navigate rain, new climbing structures, and a first meeting of the summer cubs.

The ultimate battle for dominance as scientists try to pick out the alpha male in a pack of 100-plus great white sharks off the New Zealand coast.

Navigate rain, new climbing structures, and a first meeting of the summer cubs.

The ultimate battle for dominance as scientists try to pick out the alpha male in a pack of 100-plus great white sharks off the New Zealand coast.

An inside look at the Nyaru Menteng Rescue Center in Borneo to explore how the orangutan school curriculum works, from nursery through graduation.

Navigate rain, new climbing structures, and a first meeting of the summer cubs.

The ultimate battle for dominance as scientists try to pick out the alpha male in a pack of 100-plus great white sharks off the New Zealand coast.

Follow the team in healing and releasing a grumpy sea turtle, and then meet a sea lion with an unusual injury that must be taken by crane to the rescue centre. Find out how the vet aids an aging fruit bat and a community rescues a one-eyed seal pup.

Animals that have evolved unusual abilities.

The remote Auyuittuq National Park is home to polar bears, glaciers and Mount Thor.

The first mammal of the year is born.

Follow the team in healing and releasing a grumpy sea turtle, and then meet a sea lion with an unusual injury that must be taken by crane to the rescue centre. Find out how the vet aids an aging fruit bat and a community rescues a one-eyed seal pup.

Animals that have evolved unusual abilities.

The remote Auyuittuq National Park is home to polar bears, glaciers and Mount Thor.

The orphaned orangutans attempt to make friends, which is a vital step in rehabilitation.

Follow the team in healing and releasing a grumpy sea turtle, and then meet a sea lion with an unusual injury that must be taken by crane to the rescue centre. Find out how the vet aids an aging fruit bat and a community rescues a one-eyed seal pup.

Rare penguins are locked in a daily game of cat and mouse with giant New Zealand sea lions; the sea lions also live in a tumultuous world, where pups must battle the elements to survive.

New Zealand's dark fjords harbor creatures normally found in the deep; as winter approaches, bottlenose dolphins must escape their freezing fjord, while in a mountain river, a longfin eel heeds the call of the sea.

The south-eastern coast of New Zealand is the place for young marine animals to transition from novices to independent adults; young whales, dolphins and seals learn to hunt, learn the rules of society, or strike out on their own adventures.

Discover why and how some of the world's most amazing animals use their special powers to survive in a diverse range of environments, and how they push the limits of engineering to achieve incredible feats that humans can only dream of.

Navigate rain, new climbing structures, and a first meeting of the summer cubs.

The ultimate battle for dominance as scientists try to pick out the alpha male in a pack of 100-plus great white sharks off the New Zealand coast.

The oceans have hidden the true depth of their hunters' inventiveness; but, wildlife photographers below and above the water's surface are capturing images that show off their prowess; discover their secrets as we travel the world.

South Cuba's remarkable coral reefs have been unexplored for over 50 years.

In September, seasonal swings activate change across the natural world.

The oceans have hidden the true depth of their hunters' inventiveness; but, wildlife photographers below and above the water's surface are capturing images that show off their prowess; discover their secrets as we travel the world.

South Cuba's remarkable coral reefs have been unexplored for over 50 years.

In September, seasonal swings activate change across the natural world.

The orphaned orangutans attempt to make friends, which is a vital step in rehabilitation.

The oceans have hidden the true depth of their hunters' inventiveness; but, wildlife photographers below and above the water's surface are capturing images that show off their prowess; discover their secrets as we travel the world.

South Cuba's remarkable coral reefs have been unexplored for over 50 years.

In September, seasonal swings activate change across the natural world.

Get to know Winston, a tiny abandoned cub who imprints on Judy as she nurses him 24-7.

Some of the most lush and remote landscapes on the continent are preserved in the Gwaii Haanas National Park Reserve.

Waterton National Park's location makes it one of the best spots on earth to spot wildlife.

Hope struggles to save a seal for the first time.

Get to know Winston, a tiny abandoned cub who imprints on Judy as she nurses him 24-7.

Some of the most lush and remote landscapes on the continent are preserved in the Gwaii Haanas National Park Reserve.

Waterton National Park's location makes it one of the best spots on earth to spot wildlife.

Food-obsessed Beni receives an educational lesson from the local dominant male Petruk; Spanser, a former illegal pet, attempts to control his sweet tooth.

Get to know Winston, a tiny abandoned cub who imprints on Judy as she nurses him 24-7.

Follow two families of cheetahs struggle against heat, starvation and predators on the Serengeti.

Koalas live in isolated forests in east and southeast Australia.

Koala behavior changes dramatically during mating season.

The oceans have hidden the true depth of their hunters' inventiveness; but, wildlife photographers below and above the water's surface are capturing images that show off their prowess; discover their secrets as we travel the world.

South Cuba's remarkable coral reefs have been unexplored for over 50 years.

In September, seasonal swings activate change across the natural world.

When a tiny piece of trash ruins a raccoon's life, Doctor Jessica cuts it free, but Hope faces tough decisions about its future; a volunteer plunges in to save an injured goose.

Dr. Amanda removes a sable antelope's tracking collar and the animal-care team help a flea-riddled baby vervet monkey find a new mom, free two orphaned serval cats, and follow 20 yellow baboons into their new enclosure.

A veterinarian and his team encounter dangerous challenges as they care for endangered animals at a hospital in the Guatemalan jungle.

When a tiny piece of trash ruins a raccoon's life, Doctor Jessica cuts it free, but Hope faces tough decisions about its future; a volunteer plunges in to save an injured goose.

Dr. Amanda removes a sable antelope's tracking collar and the animal-care team help a flea-riddled baby vervet monkey find a new mom, free two orphaned serval cats, and follow 20 yellow baboons into their new enclosure.

A veterinarian and his team encounter dangerous challenges as they care for endangered animals at a hospital in the Guatemalan jungle.

Food-obsessed Beni receives an educational lesson from the local dominant male Petruk; Spanser, a former illegal pet, attempts to control his sweet tooth.

When a tiny piece of trash ruins a raccoon's life, Doctor Jessica cuts it free, but Hope faces tough decisions about its future; a volunteer plunges in to save an injured goose.

Dr. Amanda removes a sable antelope's tracking collar and the animal-care team help a flea-riddled baby vervet monkey find a new mom, free two orphaned serval cats, and follow 20 yellow baboons into their new enclosure.

A veterinarian and his team encounter dangerous challenges as they care for endangered animals at a hospital in the Guatemalan jungle.

Celebrate as a newly arrived trio of sisters teaches Winston about friendship.

One of the world's largest polar bear denning sites hosts both tundra and marine environments.

Visitors to Nahanni National Park can see striking waterfalls, mountain peaks and canyons.

A new volunteer and a raven become roommates at the rehab.

Celebrate as a newly arrived trio of sisters teaches Winston about friendship.

One of the world's largest polar bear denning sites hosts both tundra and marine environments.

Visitors to Nahanni National Park can see striking waterfalls, mountain peaks and canyons.

Going up against infant Cesia's case of malaria and spotting a thief in the food store.

Celebrate as a newly arrived trio of sisters teaches Winston about friendship.

As the leaves change, wild urges grip the animals; Rams Roger and Hamish battle for dominance, while Sally the hen flies the coop for a tour of the farm.

The farm animals settle for the shortest days of the year; to stave off boredom, the cows enjoy holiday treats and a concert; Sheila is busy with nine piglets.

Experts examine how play affects the learning process for most animals in domestic and wild habitats.

Discovering how species buddy up for group games with astonishing benefits; how various animals, from young hyenas playing tug of war to mischievous monkeys getting rough and tumble, communicate the rules of their antics.

When a tiny piece of trash ruins a raccoon's life, Doctor Jessica cuts it free, but Hope faces tough decisions about its future; a volunteer plunges in to save an injured goose.

Dr. Amanda removes a sable antelope's tracking collar and the animal-care team help a flea-riddled baby vervet monkey find a new mom, free two orphaned serval cats, and follow 20 yellow baboons into their new enclosure.

A veterinarian and his team encounter dangerous challenges as they care for endangered animals at a hospital in the Guatemalan jungle.

A narrow band of Africa's coast is home to a diverse array of marine life.

Heading to America's far north for a peek at the ultimate fighters that live along its waterways; a spring thaw kicks off the competition, pitting eagles against herons, bears against bears, and dragonfly nymphs against venomous giant water bugs.

Enduring winter and early spring on the west coast, where animals eke out a chilly existence; watching red deer battle on windswept Inishvickillane, welcome seal pups amid howling storms on the Inishkea islands.

A narrow band of Africa's coast is home to a diverse array of marine life.

Heading to America's far north for a peek at the ultimate fighters that live along its waterways; a spring thaw kicks off the competition, pitting eagles against herons, bears against bears, and dragonfly nymphs against venomous giant water bugs.

Enduring winter and early spring on the west coast, where animals eke out a chilly existence; watching red deer battle on windswept Inishvickillane, welcome seal pups amid howling storms on the Inishkea islands.

Going up against infant Cesia's case of malaria and spotting a thief in the food store.

A narrow band of Africa's coast is home to a diverse array of marine life.

Heading to America's far north for a peek at the ultimate fighters that live along its waterways; a spring thaw kicks off the competition, pitting eagles against herons, bears against bears, and dragonfly nymphs against venomous giant water bugs.

Enduring winter and early spring on the west coast, where animals eke out a chilly existence; watching red deer battle on windswept Inishvickillane, welcome seal pups amid howling storms on the Inishkea islands.

Bone up on outdoor skills as Winston and the X girls move into their new fresh-air enclosure; witness Yasmine and Yara's kindergarten power struggle.

The scattered terrain of St. Lawrence Islands.

A healthy bison population is threatened by where they eat.

Something big and brown is headed to "Hope for Wildlife," but this black bear is tied up in red tape.

Bone up on outdoor skills as Winston and the X girls move into their new fresh-air enclosure; witness Yasmine and Yara's kindergarten power struggle.

The scattered terrain of St. Lawrence Islands.

A healthy bison population is threatened by where they eat.

Tracking down Lahei, who's gone AWOL; seeing who earns their post-college freedom.

Bone up on outdoor skills as Winston and the X girls move into their new fresh-air enclosure; witness Yasmine and Yara's kindergarten power struggle.

Volcanologist Tom Pfeiffer explores some of Indonesia's most remote volcanoes.

The ancient Aztec legend of Popocatépetl.

In Indonesia, the air is 40 times above safe levels for humans and sulphuric acid vents from the ground in dense, yellow clouds; small volcanoes are reported to erupt every 15 minutes.

Japan is home to two of the top five most dangerous volcanoes on the planet.

A narrow band of Africa's coast is home to a diverse array of marine life.

Heading to America's far north for a peek at the ultimate fighters that live along its waterways; a spring thaw kicks off the competition, pitting eagles against herons, bears against bears, and dragonfly nymphs against venomous giant water bugs.