"Class Clown" Valentino is busy showing off; the staff decide that "Big Boy" Beni needs to lose weight; teenage mom Clara and her baby Clarita face a return to island life; they welcome a new pupil: Alba, the only reported albino orangutan.

A front-row seat to the planet's biggest biomass migration, the annual 1,000-mile sardine run along South Africa's east coast.

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.

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

A breathtaking journey down the German section of the beautiful Moselle river, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

Marshes and bogs are home to the endangered Blanding's Turtle, but the habitat is disappearing.

The complicated relationships of crustaceans.

Hope and Dr. Barry have their hands full wrangling five baby black bears.

A breathtaking journey down the German section of the beautiful Moselle river, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

Marshes and bogs are home to the endangered Blanding's Turtle, but the habitat is disappearing.

The complicated relationships of crustaceans.

Hope and Dr. Barry have their hands full wrangling five baby black bears.

Exploring the wild blue caribbean waters of cozumel, from the paso del cedral coral reef to the world's longest subterranean underwater cave system.

Home to the world's second-largest barrier reef, Roatan is one of the world's top dive spots - known for its rare black corals, low-lying nurse sharks and fearsome-looking barracuda.

The island nation of Palau created the first shark sanctuary and the largest marine sanctuary.

Sharks are some of the oldest predators still living.

Christmas Island is home to plants and creatures found nowhere else in the world.

Contemplate shark community hierarchies and discover how they socialize.

Drop in at a pit stop for great whites and search for a north-south connection.

Aim for harmonious coexistence in spots where human and shark worlds collide.

The colorful world of Earth's essential pollinators - bees, moths and butterflies.

A look at the supercharged abilities that give some animals an edge in life; discovering fireflies' flirty flashes, the tarsier's incredible night vision, the mantis shrimp' knockout punch and the saltwater croc's prey-detecting pressure sensors.

The colorful world of Earth's essential pollinators - bees, moths and butterflies.

A look at the supercharged abilities that give some animals an edge in life; discovering fireflies' flirty flashes, the tarsier's incredible night vision, the mantis shrimp' knockout punch and the saltwater croc's prey-detecting pressure sensors.

Kasper, who is 90kgs, somehow eludes the capture team and climbs 30 meters high in a tree; Beni's food theft and ongoing weight gain starts causing serious concern for his health.

The colorful world of Earth's essential pollinators - bees, moths and butterflies.

A look at the supercharged abilities that give some animals an edge in life; discovering fireflies' flirty flashes, the tarsier's incredible night vision, the mantis shrimp' knockout punch and the saltwater croc's prey-detecting pressure sensors.

New York's Hudson River stretches 315 miles through natural landscapes, from the Adirondack Mountains to the George Washington Bridge and Statue of Liberty.

Wild horses and ponies on the last of France's overseas territory.

Invasive species like rabbits and starlings can have a negative impact on native species.

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

New York's Hudson River stretches 315 miles through natural landscapes, from the Adirondack Mountains to the George Washington Bridge and Statue of Liberty.

Wild horses and ponies on the last of France's overseas territory.

Invasive species like rabbits and starlings can have a negative impact on native species.

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

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.

Eoin starts his island voyage on Rathlin, then heads west for Malin Head and Inishtrahull meeting Basking Sharks and Dolphins en route, before going south to Achill Island and the story of the Irish Stoat.

Eoin visits a wondrous native woodland on Clare Island and as he sails his Galway Hooker through Connemara's turquoise waters he finds deserted islands home to skylarks and on the Aran Islands, Ireland's only native reptile.

A shark scientist explores the mysteries of the hammerhead shark, using technology in the form of a remote-controlled stingray to learn more about the huge deepwater predators off the small island of Bimini.

Researchers study shark behavior and fight for the protection of these predators.

Researchers risk everything to unlock secret shark behaviours, challenge myths about sharks, and fight for the protection of these predators.

In some of the most-remote regions on the planet, researchers dive deep and brave danger to unlock secret shark behaviors; they fight for the protection of these supreme predators before it's too late.

Sharks often get portrayed as mindless predators prone to attacking humans, but there is more to these graceful apex predators than meets the eye; the Bimini Sharklab undertakes novel research into shark intelligence.

The Danube River, which stretches from the Alps to the Black Sea, supports a surprising range of wildlife and is coping with years of human impact. (2 of 3).

Patrick Aryee follows grizzly bears that are taking a risk by leaving their winter dens early; hungry wolves are struggling to bring down their elk prey in the unusually shallow snow.

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.

The Danube River, which stretches from the Alps to the Black Sea, supports a surprising range of wildlife and is coping with years of human impact. (2 of 3).

Programming to be announced.

Patrick Aryee follows grizzly bears that are taking a risk by leaving their winter dens early; hungry wolves are struggling to bring down their elk prey in the unusually shallow snow.

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.

Valentino, Yutris and the rest of group two have fun as they visit group three's flooded classroom; three quarantine infants get the results of their TB tests; the residents of Bangamat Island do not welcome newcomers leading to a confrontation.

Programming to be announced.

The Danube River, which stretches from the Alps to the Black Sea, supports a surprising range of wildlife and is coping with years of human impact. (2 of 3).

Patrick Aryee follows grizzly bears that are taking a risk by leaving their winter dens early; hungry wolves are struggling to bring down their elk prey in the unusually shallow snow.

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.

Various parks around Africa.

Bill Nighy narrates a trip along the River Po, traveling across northern Italy from the snow-capped Alps to the delta where it meets the Adriatic Sea.

On Canada's East Coast is a wildlife rehabilitation center that rehabilitates and releases animals.

Canada's east coast experiences all four seasons.

Overpopulation of deer in Hampton, N.B.

Insight into the world of the wombat, one of the largest burrowing animals in the world.

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

Various parks around Africa.

Bill Nighy narrates a trip along the River Po, traveling across northern Italy from the snow-capped Alps to the delta where it meets the Adriatic Sea.

On Canada's East Coast is a wildlife rehabilitation center that rehabilitates and releases animals.

Canada's east coast experiences all four seasons.

Overpopulation of deer in Hampton, N.B.

Insight into the world of the wombat, one of the largest burrowing animals in the world.

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

The filmmaker sheds light on the life of aquatic animals residing in remote areas of the Earth where survival is paramount.

The moose and wolves of Lake Superior battle.

The Asian carp, an invasive species, travels through North American waters, eating, breeding and decimating native fish populations.

The filmmaker sheds light on the life of aquatic animals residing in remote areas of the Earth where survival is paramount.

Researchers continue to fight for the survival of the Lake Erie Watersnake, a species on the brink of extinction; a new source of food could mean the snakes have a future after all, so long as the lake's algae blooms cooperate.

Some people are fighting to save the endangered massasauga rattlesnake, which was vilified for years.

The filmmaker sheds light on the life of aquatic animals residing in remote areas of the Earth where survival is paramount.

The peregrine falcon population has been rising in numbers.

Animals that inhabit waters controlled by dams are put in danger.

The filmmaker sheds light on the life of aquatic animals residing in remote areas of the Earth where survival is paramount.

Flying squirrels leaping through the air.

Sometimes animals get a second chance.

The filmmaker sheds light on the life of aquatic animals residing in remote areas of the Earth where survival is paramount.

The Canary Islands are a whale paradise.

An exploration of how wildlife, including cheetahs, hyenas and elephants, survive the cycles of draught and rainfall.

The foxes escape their enclosure; two seals are released into the wild.

An exploration of how wildlife, including cheetahs, hyenas and elephants, survive the cycles of draught and rainfall.

Patrick Aryee follows grizzly bears that are taking a risk by leaving their winter dens early; hungry wolves are struggling to bring down their elk prey in the unusually shallow snow.

Observe the natural and human forces that have shaped Ningaloo Reef, Cape Range, and Exmouth Gulf with Tim, Traditional Owners, and other experts. Check out a million-year-old fossil reef, a gargantuan fish, and a ray that packs quite a punch.

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.

An exploration of social and familial bonds in the animal kingdom.

Exploring the many species that live in complex and hierarchical societies.

An exploration of how plants and animals handle the 24-hour cycle.

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.

An exploration of social and familial bonds in the animal kingdom.

Exploring the many species that live in complex and hierarchical societies.

An exploration of how plants and animals handle the 24-hour cycle.

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.

Various parks around Africa.

Moving day arrives for the nursery school kids; Beni gets a beating from a bully; the socialization cage has a new queen; dominant male Pujon is still on a time-out after attacking Alba, but he's allowed a second chance to bond with his rival.

On Canada's East Coast is a wildlife rehabilitation center that rehabilitates and releases animals.

Insight into the world of the wombat, one of the largest burrowing animals in the world.

Exploring the many species that live in complex and hierarchical societies.

A look at the history and diversity of Canada's most spectacular national parks.

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.

A look at the history and diversity of Canada's most spectacular national parks.

Various parks around Africa.

Biologists race the clock as they try to figure out why North American loons are suddenly in danger, unlock the mysterious lives of these beloved birds, and ponder whether their cries will continue to be summer's soundtrack or go silent forever.

On Canada's East Coast is a wildlife rehabilitation center that rehabilitates and releases animals.

Marine life in the waters surrounding Brier Island in Nova Scotia includes dolphins and humpback whales.

Madagascar is home to strange animals not found anywhere else on Earth; when these animals fight for supremacy, their battles are just as strange, from weird neck-wrestling weevils to ring tailed lemur moms that go into battle with baby on board.

Insight into the world of the wombat, one of the largest burrowing animals in the world.

Hope recruits an unlikely wildlife rescuer.

Various parks around Africa.

Biologists race the clock as they try to figure out why North American loons are suddenly in danger, unlock the mysterious lives of these beloved birds, and ponder whether their cries will continue to be summer's soundtrack or go silent forever.

On Canada's East Coast is a wildlife rehabilitation center that rehabilitates and releases animals.

Marine life in the waters surrounding Brier Island in Nova Scotia includes dolphins and humpback whales.

Madagascar is home to strange animals not found anywhere else on Earth; when these animals fight for supremacy, their battles are just as strange, from weird neck-wrestling weevils to ring tailed lemur moms that go into battle with baby on board.

Insight into the world of the wombat, one of the largest burrowing animals in the world.

Hope recruits an unlikely wildlife rescuer.

The filmmaker provides insights into the lives of predators in the African wilderness and the strategies they employ to survive.

The Karoo National Park was once an inland sea.

The filmmaker provides insights into the lives of predators in the African wilderness and the strategies they employ to survive.

The Kgalagadi Transfrontier Park has ancient rivers hidden underground.

The filmmaker provides insights into the lives of predators in the African wilderness and the strategies they employ to survive.

Animals of northern Botswana face a daily battle during the dry season.

The filmmaker provides insights into the lives of predators in the African wilderness and the strategies they employ to survive.

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.

The filmmaker provides insights into the lives of predators in the African wilderness and the strategies they employ to survive.

The Luangwa River belongs to the hippos. The world's largest concentrations of hippos are found here. They spend their days submerged, keeping cool in the hot sun.

An exploration of social and familial bonds in the animal kingdom.

Exploring the many species that live in complex and hierarchical societies.

An exploration of how plants and animals handle the 24-hour cycle.

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.

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.

RSPCA vets treat a favorite koala in crisis and a prickly pair get messy.

An injured goanna climbs high up a tree and a bird gets fancy footwear.

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.

RSPCA vets treat a favorite koala in crisis and a prickly pair get messy.

An injured goanna climbs high up a tree and a bird gets fancy footwear.

Beni faces a day of reckoning as all the forest school students are held back for a weigh-in; Alba is back in isolation after being diagnosed with typhoid.

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.

RSPCA vets treat a favorite koala in crisis and a prickly pair get messy.

An injured goanna climbs high up a tree and a bird gets fancy footwear.

The Everglades during the winter season.

Australia is home to an eclectic array of creatures, and the ways to succeed as an alpha are just as diverse; the beach turns into a dueling ground and the outback becomes a boxing ring, as animals face off with their own kind.

The African savanna is an epic landscape, and whether it's head-bashing hippos, hormone-crazed elephants or dueling lions, battles that rage on the savanna are just as epic.

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

The Everglades during the winter season.

Australia is home to an eclectic array of creatures, and the ways to succeed as an alpha are just as diverse; the beach turns into a dueling ground and the outback becomes a boxing ring, as animals face off with their own kind.

The African savanna is an epic landscape, and whether it's head-bashing hippos, hormone-crazed elephants or dueling lions, battles that rage on the savanna are just as epic.

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

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.

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.

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 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.

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.

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.

RSPCA vets treat a favorite koala in crisis and a prickly pair get messy.

An injured goanna climbs high up a tree and a bird gets fancy footwear.

The long-held belief that pumas are solitary animals is tested when they are seen exhibiting social behavior in southern Chile.

The near extinction and rescue of the American bison through the efforts of William Temple Hornaday, a taxidermist at the Smithsonian Institution who headed west to hunt bison for the museum but ended up saving the species instead.

Gordon Buchanan must overcome his own fear, black bears have a dangerous reputation and attack more people than any other bear in the world, but once he meets Lily, a tolerant bear, mother of Hope, Gordon feels heartbroken.

The long-held belief that pumas are solitary animals is tested when they are seen exhibiting social behavior in southern Chile.

The near extinction and rescue of the American bison through the efforts of William Temple Hornaday, a taxidermist at the Smithsonian Institution who headed west to hunt bison for the museum but ended up saving the species instead.

Gordon Buchanan must overcome his own fear, black bears have a dangerous reputation and attack more people than any other bear in the world, but once he meets Lily, a tolerant bear, mother of Hope, Gordon feels heartbroken.

Rescued orphan Josh needs his broken wrist examined by the school vets, while Beni has a trip to the dentist to treat his bad breath.

The long-held belief that pumas are solitary animals is tested when they are seen exhibiting social behavior in southern Chile.

The near extinction and rescue of the American bison through the efforts of William Temple Hornaday, a taxidermist at the Smithsonian Institution who headed west to hunt bison for the museum but ended up saving the species instead.

Gordon Buchanan must overcome his own fear, black bears have a dangerous reputation and attack more people than any other bear in the world, but once he meets Lily, a tolerant bear, mother of Hope, Gordon feels heartbroken.

Waters flood the prairies, mangroves and marshes.

Welcome to India - a land of exotic animals and exotic warfare; monkeys stage dusty dust-ups, blackbucks wage open war on the open plains, and peacock dandies swing switchblades: these are colorful battles worthy of a vibrant land.

Massive elephant seals go nose to nose to win the title of beach master; giant petrels earn the nickname "murderous garbagemen"; a female humpback goes to extremes to protect her calf from amorous males.

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

Waters flood the prairies, mangroves and marshes.

Welcome to India - a land of exotic animals and exotic warfare; monkeys stage dusty dust-ups, blackbucks wage open war on the open plains, and peacock dandies swing switchblades: these are colorful battles worthy of a vibrant land.

Massive elephant seals go nose to nose to win the title of beach master; giant petrels earn the nickname "murderous garbagemen"; a female humpback goes to extremes to protect her calf from amorous males.

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

In central Namibia, a pack of painted wolves roams the arid land; amid threats from lions and drought, a plucky little pup called Lyca has to grow up fast, learn the skills of a hunter and find her place as member of the pack.

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.

Enter Brazil's Serra da Capivara at the beginning of the dry season as a troop of capuchin monkeys welcomes its newest member; explore the forest alongside the curious baby, who faces threats from predators, food shortages, and even the wild climate.

In India, Ravi the baby lion-tailed macaque faces life in a shrinking habitat and encroaching human world; Ravi has a caring mom, a protective dad, a playful sister and numerous, cousins, aunts and uncles all watching over him.

The long-held belief that pumas are solitary animals is tested when they are seen exhibiting social behavior in southern Chile.

The near extinction and rescue of the American bison through the efforts of William Temple Hornaday, a taxidermist at the Smithsonian Institution who headed west to hunt bison for the museum but ended up saving the species instead.

Gordon Buchanan must overcome his own fear, black bears have a dangerous reputation and attack more people than any other bear in the world, but once he meets Lily, a tolerant bear, mother of Hope, Gordon feels heartbroken.

The team investigates which foods are best for pets, demonstrates what can be done to save an injured animal and witnesses a pioneering operation that could save thousands of cats across the country.

Spy on the summer cubs as they learn to climb trees and forage for food in preparation for their release into the wild; get surprised by a set of new arrivals, observe the annual pre-hibernation eating binge and enjoy a bear-friendly Thanksgiving.

Tackling pet hoarding and a deadly snake.

The team investigates which foods are best for pets, demonstrates what can be done to save an injured animal and witnesses a pioneering operation that could save thousands of cats across the country.

Spy on the summer cubs as they learn to climb trees and forage for food in preparation for their release into the wild; get surprised by a set of new arrivals, observe the annual pre-hibernation eating binge and enjoy a bear-friendly Thanksgiving.

Tackling pet hoarding and a deadly snake.

The babysitters try to get Beni's diet under control; Malika shows off her passion for fashion; Darril and Syahrini get steamy in the treetops; Cinta makes a watery discovery; two new babies arrive, one of whom is emaciated.

The team investigates which foods are best for pets, demonstrates what can be done to save an injured animal and witnesses a pioneering operation that could save thousands of cats across the country.

Spy on the summer cubs as they learn to climb trees and forage for food in preparation for their release into the wild; get surprised by a set of new arrivals, observe the annual pre-hibernation eating binge and enjoy a bear-friendly Thanksgiving.

Tackling pet hoarding and a deadly snake.

Gros Morne National Park is the result of continental collision.

Canada, where summer is short and time is tight, any time is the right time to fight; the mighty North provides the setting for bison, bald eagles and polar bears to wage some of the most heavy-duty fighting in the animal kingdom.

Learning to fight dirty with a guanaco, head-butting a fellow iguana to claim a piece of prime territory, and meeting a hermit crab who forcibly evicts a tenant from its shell.

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

Gros Morne National Park is the result of continental collision.

Canada, where summer is short and time is tight, any time is the right time to fight; the mighty North provides the setting for bison, bald eagles and polar bears to wage some of the most heavy-duty fighting in the animal kingdom.

Learning to fight dirty with a guanaco, head-butting a fellow iguana to claim a piece of prime territory, and meeting a hermit crab who forcibly evicts a tenant from its shell.

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

Hammerheads, Galapagos sharks, rays, and other species populate the waters of Cocos Island.

Stunning underwater video taken from the wildest expeditions of the world's greatest dive shops highlight the ocean's most spectacular species.

The Bahamas are surrounded by coral reefs and underwater caves with sharks, turtles, and dolphins.

Boning up on desert eats; flirting with lions; witnessing an elephant babysitters' club.

Stealing meals with frigate birds; visiting a warthog spa; cracking an elephant code.

The team investigates which foods are best for pets, demonstrates what can be done to save an injured animal and witnesses a pioneering operation that could save thousands of cats across the country.

Spy on the summer cubs as they learn to climb trees and forage for food in preparation for their release into the wild; get surprised by a set of new arrivals, observe the annual pre-hibernation eating binge and enjoy a bear-friendly Thanksgiving.

Tackling pet hoarding and a deadly snake.

The sun rises on a day in May and the animals of the American tropics get ready to beat the heat.

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

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 sun rises on a day in May and the animals of the American tropics get ready to beat the heat.

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

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.

Difficult quarantine student Taymur has a breakthrough and starts to embrace his jungle school lesson; serial truant Luthy skips class again and gives the staff a run for their money.

The sun rises on a day in May and the animals of the American tropics get ready to beat the heat.

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

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 crew explores the Atacama Desert, the world's driest non-polar region.

With real-life dueling dragons, giant sumo-wrestling beetles, street-fighting monkeys, and sea turtles that play king of the hill - on top of another sea turtle, Southeast Asia boasts a wide range of wildlife warriors.

Bighorn rams rattle the mountaintops; Brown bears battle, desperate to fatten up for winter; Sharp-tailed grouse shake their tail-feathers; Wild stallions rumble with beauty and grace.

Gators, tortoises and stunning seabirds of southwest Florida.

The crew explores the Atacama Desert, the world's driest non-polar region.

With real-life dueling dragons, giant sumo-wrestling beetles, street-fighting monkeys, and sea turtles that play king of the hill - on top of another sea turtle, Southeast Asia boasts a wide range of wildlife warriors.

Bighorn rams rattle the mountaintops; Brown bears battle, desperate to fatten up for winter; Sharp-tailed grouse shake their tail-feathers; Wild stallions rumble with beauty and grace.

Gators, tortoises and stunning seabirds of southwest Florida.

Go on a risky tagging mission and get a 360-degree view of feeding hot spots.

Hunt for signs of mating sharks and get a peek at their hidden pupping grounds.

Take a deep dive to find out what bull sharks and great whites do after sunset.

Nature's most wanted species don't get the respect they deserve, including the great white shark's electrical sensors, the razor-sharp limbs of the dead leaf mantis and the zombie-creating powers of cordyceps fungi.

Scientists from around the world reveal what makes sharks the ocean's ultimate predators.

Sharks are the ocean's most resilient hunters; discovering just how far they are willing to go.

Sharks have adapted to thrive in extreme places.

A shark scientist explores the mysteries of the hammerhead shark, using technology in the form of a remote-controlled stingray to learn more about the huge deepwater predators off the small island of Bimini.

The ruthless realm of some of the stealthiest and cleverest insects in the animal kingdom - from praying mantises and aquatic insects to dragonflies.

The crucial ecological roles that beetles play in nearly every environment, and why they are often regarded "the most important species on the planet.".

Nature's most wanted species don't get the respect they deserve, including the great white shark's electrical sensors, the razor-sharp limbs of the dead leaf mantis and the zombie-creating powers of cordyceps fungi.

The ruthless realm of some of the stealthiest and cleverest insects in the animal kingdom - from praying mantises and aquatic insects to dragonflies.

The crucial ecological roles that beetles play in nearly every environment, and why they are often regarded "the most important species on the planet.".

Nature's most wanted species don't get the respect they deserve, including the great white shark's electrical sensors, the razor-sharp limbs of the dead leaf mantis and the zombie-creating powers of cordyceps fungi.

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.

The ruthless realm of some of the stealthiest and cleverest insects in the animal kingdom - from praying mantises and aquatic insects to dragonflies.

The crucial ecological roles that beetles play in nearly every environment, and why they are often regarded "the most important species on the planet.".

Nature's most wanted species don't get the respect they deserve, including the great white shark's electrical sensors, the razor-sharp limbs of the dead leaf mantis and the zombie-creating powers of cordyceps fungi.

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

From the Highlands to the Alps, Europe's evocative landscapes are the backdrop for epic wildlife drama; normally stoic red deer go wild during the rut; wolf packs clash over territory, and foxes do the foxtrot but it's not as nice as it sounds.

Wildebeest battle for herd hierarchy, meerkats live the thug life, floppy fish fight it out on land and locusts give up their vegetarian ways in a frenzy of cannibalism; it all happens on the wild and wide-open landscape of South Africa.

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

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

From the Highlands to the Alps, Europe's evocative landscapes are the backdrop for epic wildlife drama; normally stoic red deer go wild during the rut; wolf packs clash over territory, and foxes do the foxtrot but it's not as nice as it sounds.

Wildebeest battle for herd hierarchy, meerkats live the thug life, floppy fish fight it out on land and locusts give up their vegetarian ways in a frenzy of cannibalism; it all happens on the wild and wide-open landscape of South Africa.

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

Contemplate shark community hierarchies and discover how they socialize.

Drop in at a pit stop for great whites and search for a north-south connection.

Aim for harmonious coexistence in spots where human and shark worlds collide.

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

Exploring the shores of the Northern Territory and the abundant waters of the Great Barrier Reef; Lizzie faces flooded roads, hungry saltwater crocs, and killer jellyfish as she investigates why many deadly creatures make remote areas their home.

Saying goodbye to the tropics and dipping into the cool southern-coast waters; witnessing grey nurse sharks, shape-shifting cuttlefish and blue whales; playing with penguins and sea lions.

Completing the trip's final lap in the untamed lands where Australia's interior desert meets the Indian Ocean; confronting the challenges of survival in the region; Lizzie dives with tiger sharks, manta rays and nomadic turtles.

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 Yukon River boasts one of the longest salmon runs in the world; from musk ox to ice bears, there is a rich variety of life that call this frozen river home.

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.

The Yukon River boasts one of the longest salmon runs in the world; from musk ox to ice bears, there is a rich variety of life that call this frozen river home.

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.

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.

The Yukon River boasts one of the longest salmon runs in the world; from musk ox to ice bears, there is a rich variety of life that call this frozen river home.

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.

Traveling the Dordogne River via traditional boats through the green heart of southwest France; drinking wine and hunting for truffles; riding a luxury cruiser to a lighthouse built for a king.

The latitudes south of the Sahara offer vastly different battlegrounds for a wide range of warriors; male giraffes swing their heads like wrecking balls, zebras boast the most powerful kick in the animal kingdom, and chimpanzee warfare is familiar.

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.

Traveling the Dordogne River via traditional boats through the green heart of southwest France; drinking wine and hunting for truffles; riding a luxury cruiser to a lighthouse built for a king.

The latitudes south of the Sahara offer vastly different battlegrounds for a wide range of warriors; male giraffes swing their heads like wrecking balls, zebras boast the most powerful kick in the animal kingdom, and chimpanzee warfare is familiar.

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.

Traveling the Dordogne River via traditional boats through the green heart of southwest France; drinking wine and hunting for truffles; riding a luxury cruiser to a lighthouse built for a king.

Fraser Island is the largest sand island on Earth and a UNESCO World Heritage Site.

Human influence and effect on the beaches of California.

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.

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.

The Yukon River boasts one of the longest salmon runs in the world; from musk ox to ice bears, there is a rich variety of life that call this frozen river home.

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.