Six graduates from jungle school are finally set to be freed into the wild from the pre-release islands after an arduous journey by road and river into the heart of Borneo.

Exploring the bizarre mating rituals of the ocean's most peculiar creatures; learning how bloody battles for mates, gender bending, and super-size litters of babies might secure a next generation for these animals.

As winter turns to spring, temperatures rise and Yellowstone bursts into life; beavers feast on new green shoots, baby bison take their first faltering steps and grizzly cubs emerge from their dens.

Summer in Yellowstone brings about new challenges; as food becomes scarce, wolves have a surprising strategy to keep their pups fed.

Iceland is the world's largest volcanic island and new ground is born daily.

Sea lions throw their weight around to win a mate, Cape buffalo deliver knockout punches, Canada geese hit hard with their wings, and lionesses rule the Savanna with an iron paw.

Warthogs' lumpy armor, giant African bullfrogs' jumping and biting skills, wild turkeys' sharp beaks and razorlike spurs, and Nile crocodiles' powerful jaws.

The first fawn of the year arrives at the rehab centre; two volunteers plan to make rehab a lifelong commitment.

Iceland is the world's largest volcanic island and new ground is born daily.

Sea lions throw their weight around to win a mate, Cape buffalo deliver knockout punches, Canada geese hit hard with their wings, and lionesses rule the Savanna with an iron paw.

Warthogs' lumpy armor, giant African bullfrogs' jumping and biting skills, wild turkeys' sharp beaks and razorlike spurs, and Nile crocodiles' powerful jaws.

Big changes are afoot for some of the pupils at Orangutan Jungle School, where orphaned orangutans learn the forest skills they need to survive in the wild; four new arrivals join the nursery classes and some familiar faces move up a grade.

Iceland is the world's largest volcanic island and new ground is born daily.

Intense drought in the Luangwa Valley in Zambia.

A global El Niño event strengthens the drought.

The beginning of the wet season transforms the landscape.

The camelthorn tree provides life to creatures that dwell in Africa's Kalahari.

Exploring the bizarre mating rituals of the ocean's most peculiar creatures; learning how bloody battles for mates, gender bending, and super-size litters of babies might secure a next generation for these animals.

As winter turns to spring, temperatures rise and Yellowstone bursts into life; beavers feast on new green shoots, baby bison take their first faltering steps and grizzly cubs emerge from their dens.

Summer in Yellowstone brings about new challenges; as food becomes scarce, wolves have a surprising strategy to keep their pups fed.

Lizzie heads north to tag sharks and witness first-hand the slow disappearance of sea ice; she does time in bear jail with polar bears who are caught raiding a town for food after their hunting grounds diminish.

Take a deep dive into animal playtime and see how many of these activities are really learning opportunities in disguise; find out why hamsters love to run in a wheel, how dogs bone up on pack rules and the real meaning behind a rabbit's hop.

Gangs battle for dominance, their lives a constant struggle; locusts swarm, stripping landscapes bare; the coconut octopus ambushes prey, a master of deception; nature reveals its raw power, where only the strongest survive.

Lizzie heads north to tag sharks and witness first-hand the slow disappearance of sea ice; she does time in bear jail with polar bears who are caught raiding a town for food after their hunting grounds diminish.

Take a deep dive into animal playtime and see how many of these activities are really learning opportunities in disguise; find out why hamsters love to run in a wheel, how dogs bone up on pack rules and the real meaning behind a rabbit's hop.

Gangs battle for dominance, their lives a constant struggle; locusts swarm, stripping landscapes bare; the coconut octopus ambushes prey, a master of deception; nature reveals its raw power, where only the strongest survive.

Big changes are afoot for some of the pupils at Orangutan Jungle School, where orphaned orangutans learn the forest skills they need to survive in the wild; four new arrivals join the nursery classes and some familiar faces move up a grade.

Lizzie heads north to tag sharks and witness first-hand the slow disappearance of sea ice; she does time in bear jail with polar bears who are caught raiding a town for food after their hunting grounds diminish.

Take a deep dive into animal playtime and see how many of these activities are really learning opportunities in disguise; find out why hamsters love to run in a wheel, how dogs bone up on pack rules and the real meaning behind a rabbit's hop.

Gangs battle for dominance, their lives a constant struggle; locusts swarm, stripping landscapes bare; the coconut octopus ambushes prey, a master of deception; nature reveals its raw power, where only the strongest survive.

Iceland's volcanoes generate one third of earth's land-based lava, but the land was sculpted by ice.

A glacial stroll alongside a Galápagos tortoise; dancing with venomous European adders; a battle between Lacerta lizards; leopard seals' stealth attacks.

Chatty capuchin monkeys; Eurasian river otters' chilling screams; fruit bats' loud complaints; orcas' human-scale speech systems.

Learning the secret of rehabilitating seals from experts at Vancouver Aquarium; search and rescue is launched.

Iceland's volcanoes generate one third of earth's land-based lava, but the land was sculpted by ice.

A glacial stroll alongside a Galápagos tortoise; dancing with venomous European adders; a battle between Lacerta lizards; leopard seals' stealth attacks.

Chatty capuchin monkeys; Eurasian river otters' chilling screams; fruit bats' loud complaints; orcas' human-scale speech systems.

Recent nursery graduates Jelapat, Talaken, Bawan and Rona join their classmates at their new classroom; Dilla unexpectedly gives birth at midnight, but the delivery does not go smoothly.

Iceland's volcanoes generate one third of earth's land-based lava, but the land was sculpted by ice.

Scan the Australian skies which regularly delivers a volatile weather; await cooling monsoon rains; watch lightning ignite vast wildfires; witness the adaptations that help wildlife deal with these extremes.

Experience the phenomena that swirl across the heavens in North America; watch polar bears search for food under the aurora borealis; map the frigid path of a polar vortex; elude violent tornadoes with a prairie dog family.

Observe the eternal search for water that defines the lives of Africa's wild animals; witness the biggest marine feeding frenzy on Earth, see how cobras stock up on solar power and join wildebeest herds and elephant clans on their migrations.

Learn how South America's rich diversity of weather fuels an even richer diversity of life; examine the Amazon rainforest's oxygen-breathing trees, follow the arc of a vast cloud river and meet flamingos that thrive in the sun's scorching UV rays.

Lizzie heads north to tag sharks and witness first-hand the slow disappearance of sea ice; she does time in bear jail with polar bears who are caught raiding a town for food after their hunting grounds diminish.

Take a deep dive into animal playtime and see how many of these activities are really learning opportunities in disguise; find out why hamsters love to run in a wheel, how dogs bone up on pack rules and the real meaning behind a rabbit's hop.

Gangs battle for dominance, their lives a constant struggle; locusts swarm, stripping landscapes bare; the coconut octopus ambushes prey, a master of deception; nature reveals its raw power, where only the strongest survive.

Creatures travel thousands of miles to visit the reef and Pacific weather patterns are likely to further shape the terrain and wildlife.

Head into surgery with Mara the koala, who needs a life-saving tooth operation; assess an injured sugar glider with vet Tim; rescue officer Elise pulls a flying fox out of a gutter; see nurse Bree's clutch of python eggs hatch.

Rescue officers use a technique called flagging to nab a koala with dangerously inflamed eyes; vet Tim soothes burned possum feet; vet Karina examines a half-drowned platypus before referring him to a specialist.

Creatures travel thousands of miles to visit the reef and Pacific weather patterns are likely to further shape the terrain and wildlife.

Head into surgery with Mara the koala, who needs a life-saving tooth operation; assess an injured sugar glider with vet Tim; rescue officer Elise pulls a flying fox out of a gutter; see nurse Bree's clutch of python eggs hatch.

Rescue officers use a technique called flagging to nab a koala with dangerously inflamed eyes; vet Tim soothes burned possum feet; vet Karina examines a half-drowned platypus before referring him to a specialist.

Recent nursery graduates Jelapat, Talaken, Bawan and Rona join their classmates at their new classroom; Dilla unexpectedly gives birth at midnight, but the delivery does not go smoothly.

Creatures travel thousands of miles to visit the reef and Pacific weather patterns are likely to further shape the terrain and wildlife.

Head into surgery with Mara the koala, who needs a life-saving tooth operation; assess an injured sugar glider with vet Tim; rescue officer Elise pulls a flying fox out of a gutter; see nurse Bree's clutch of python eggs hatch.

Rescue officers use a technique called flagging to nab a koala with dangerously inflamed eyes; vet Tim soothes burned possum feet; vet Karina examines a half-drowned platypus before referring him to a specialist.

The highest tides in the world are found in the Bay of Fundy on Canada's east coast.

Feeding a Giant Panda cub named Bao Bao.

Feeding a pride of adolescent lions.

Hope recruits an unlikely wildlife rescuer.

The highest tides in the world are found in the Bay of Fundy on Canada's east coast.

Feeding a Giant Panda cub named Bao Bao.

Feeding a pride of adolescent lions.

A female leopard named Olimba in Zambia's Luangwa Valley.

Dreamer, a tiger cub, forms a new friendship with the adolescent Misfit. The two unlikely friends work together to survive the hardships ahead.

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.

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

A completely new way of looking at the animal kingdom with adventurer, survivalist, and zoology nut Max Djenohan. Max is on a mission. To unlock and mimic the survival skills of some of the most charismatic animals on Earth.

Heading out with Lizzie and the Oncafari team as they set out on the hunt for a missing, dominant jaguar; monitoring the battle between young individuals who are all coveting power.

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.

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.

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.

Heading out with Lizzie and the Oncafari team as they set out on the hunt for a missing, dominant jaguar; monitoring the battle between young individuals who are all coveting power.

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.

Beni and Lala are confined to the clinic following an accident; bullied Kesi causes concern for the team; Clara and her daughter, Clarita, are chosen for release back into the wild.

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.

Flora and fauna help each other navigate seasonal changes in the forest.

The dance between predator and prey keeps nature in perfect harmony.

Along the west coast of Great Britain, the world's longest uninterrupted footpath forges through more than 800 miles of breathtaking scenery; the diverse landscape of the Welsh coast is a geological treasure.

Behind the scenes of North America's largest zoo kitchen.

The National Zoo feeds its animals by growing their own food.

Allison and Barry try to shampoo a porcupine; a returning patient is released.

Along the west coast of Great Britain, the world's longest uninterrupted footpath forges through more than 800 miles of breathtaking scenery; the diverse landscape of the Welsh coast is a geological treasure.

Behind the scenes of North America's largest zoo kitchen.

The National Zoo feeds its animals by growing their own food.

Twin male lions have ruled the Nsefu Pride for three years.

Scientists are studying cats in greater detail than before, and their groundbreaking finds challenge the conventional ideas.

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.

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

Lizzie gets to know Fera, the Queen of the Pantanal, as she teaches her rambunctious cub Simba some essential jaguar skills, including how to climb trees and hunt for dinner.

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.

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

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

Scientists are studying cats in greater detail than before, and their groundbreaking finds challenge the conventional ideas.

Lizzie gets to know Fera, the Queen of the Pantanal, as she teaches her rambunctious cub Simba some essential jaguar skills, including how to climb trees and hunt for dinner.

Lizzie gets to know Fera, the Queen of the Pantanal, as she teaches her rambunctious cub Simba some essential jaguar skills, including how to climb trees and hunt for dinner.

Scientists are studying cats in greater detail than before, and their groundbreaking finds challenge the conventional ideas.

Beni and Lala are going stir-crazy in the sick bay, but they must recover before returning to the rough and tumble of class; at forest school, a termite-foraging lesson inspires class clown Valentino to make a finger-licking discovery.

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.

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.

Young gladiators earn their stripes in the dense tropical forests of the Americas; a poison dart frog launches a toxic barrage, observe a jaguar-caiman turf war, and see a hungry coati cross paths with a defensive tarantula.

Ireland is small in size but epic in wonder; surrounded by the Atlantic ocean, Cliffs of Moher to the extraordinary Giant's Causeway, this land has been shaped and reshaped by both the power of water and violent geological forces.

Food acts as an important way for animals to keep busy, happy and healthy.

A herd of elephants from the Calgary Zoo arrive at the National Zoo in Washington D.C.

Hope and Allison look to gain more experience with pelicans by heading to southern California.

Ireland is small in size but epic in wonder; surrounded by the Atlantic ocean, Cliffs of Moher to the extraordinary Giant's Causeway, this land has been shaped and reshaped by both the power of water and violent geological forces.

Food acts as an important way for animals to keep busy, happy and healthy.

A herd of elephants from the Calgary Zoo arrive at the National Zoo in Washington D.C.

Mizumu, a male hyena, searches for a new clan.

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.

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.

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 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.

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.