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.

The Isthmus of Panama is a thoroughfare and rest stop for birds, mammals and reptiles, including turkey vultures, leatherback turtles, jaguars, coyotes, shorebirds, songbirds, and many others; scientists track animal movements and explores threats.

In South Dakota, the rugged beauty of the Badlands is the backdrop for an assortment of animals, including the American bison, the black-tailed prairie dog and the burrowing owl; prairie dog pups are threatened by badgers, golden eagles and coyotes.

Polar bears in the Arctic, penguins in Antarctica and other animals on icy islands can reveal changes taking place at the planet's frozen extremes.

The great white shark is one of the most iconic ocean creatures.

The park's hyena population grows.

Triggering the natural instincts of North African white rhinos prompts their return to the wild.

A photographer snaps into action to save a turkey vulture's life after it gets trapped under a seal carcass.

The great white shark is one of the most iconic ocean creatures.

The park's hyena population grows.

Triggering the natural instincts of North African white rhinos prompts their return to the wild.

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 great white shark is one of the most iconic ocean creatures.

Knowing more about Thiago, a brave baby coati; how he sharpens his sniffing and foraging skills, crosses suburban roads near his lush Brazilian forest home and avoids inanimate and four-legged dangers.

Visiting the last stronghold of the giant river otter in Brazil's beautiful Pantanal wetland and track pup Rio and his siblings as they test the waters, team up to evade a jaguar ambush, and become a cohesive family unit.

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

Bizarre birds have various adaptations.

Some survival adaptations make creatures ugly.

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

The Isthmus of Panama is a thoroughfare and rest stop for birds, mammals and reptiles, including turkey vultures, leatherback turtles, jaguars, coyotes, shorebirds, songbirds, and many others; scientists track animal movements and explores threats.

In South Dakota, the rugged beauty of the Badlands is the backdrop for an assortment of animals, including the American bison, the black-tailed prairie dog and the burrowing owl; prairie dog pups are threatened by badgers, golden eagles and coyotes.

Polar bears in the Arctic, penguins in Antarctica and other animals on icy islands can reveal changes taking place at the planet's frozen extremes.

Hope opens her doors to the public.

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

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.

Hope opens her doors to the public.

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

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.

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.

Hope opens her doors to the public.

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

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.

Sharks may be much more intelligent than previously thought.

An attempt to discover what is killing off the black rhino, before it's too late.

Eight giraffes are moved to a newly opened wildlife area on an island.

When a worldwide pandemic cripples the rehab, wildlife emergencies keep coming in: a bobcat that's been shot, and a massive adult seal; Hope's down to a skeleton crew as critical team members go into quarantine.

Sharks may be much more intelligent than previously thought.

An attempt to discover what is killing off the black rhino, before it's too late.

Eight giraffes are moved to a newly opened wildlife area on an island.

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.

Sharks may be much more intelligent than previously thought.

The team prepares to release two servals and a giant eagle owl, but the plan goes awry when a serval escapes into the dangerous city of Lilongwe; finding a foster mom for an orphaned vervet.

Amanda goes on an adventure to rescue a waterbuck caught by a poacher's snare; the center's resident hyena is treated for fly-bitten ears; Alma gets a mysterious late night monkey delivery.

A rescued orphaned rhino befriends a playful dog and doting sheep; a big bunny rabbit that babysits boisterous baby lambs; a porcupine that helps two English bulldogs rehabilitate injured animals.

An animal shelter puppy that helps a captive cheetah cub get ready for the wild; an injured monkey who wins over a pack of unfriendly dogs; a lonely mongoose that enjoys foraging with a flock of sheep.

Hope opens her doors to the public.

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

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.

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.

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.

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.

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.

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.

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.

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.

A journey on Scotland's River Spey, traveling from its source in the Highlands, winding by boat through the mountains to where the river meets the North Sea.

An agitated elephant ends up in a local village and the vets need to find a helicopter immediately.

The vets attempt to breed the rare Grevy's zebras while the more common zebras have to be moved.

Hope releases the last of her deer herd as spring approaches but one fawn doesn't want to leave.

A journey on Scotland's River Spey, traveling from its source in the Highlands, winding by boat through the mountains to where the river meets the North Sea.

An agitated elephant ends up in a local village and the vets need to find a helicopter immediately.

The vets attempt to breed the rare Grevy's zebras while the more common zebras have to be moved.

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.

A journey on Scotland's River Spey, traveling from its source in the Highlands, winding by boat through the mountains to where the river meets the North Sea.

The Torngat Mountains National Park was set up in part to return the aboriginal people to their birthright.

Quttinirpaaq National Park is affected by climate change.

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

Pukaskwa's unpredictable landscape features boreal forests and iron-rich plutonic rocks.

Admire arctic animals' secret superpowers of survival.

Sharks have adapted to thrive in extreme places.

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.

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.

Trekking through the Canadian rainforest, looking up at dizzying redwood trees and exploring giant kelp forests with Lizzie as she experiences the wild West Coast of North America; crossing paths with wolves and bears while salmon travel upstream.

The team uncover the hidden lives of three animals; in the Kalahari Desert they put cameras on wild meerkats; in Cameroon, Gordon and scientist Mimi Swift look at a four-year-old orphan chimp; in Argentina, penguins carry cameras far out to sea.

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

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

Trekking through the Canadian rainforest, looking up at dizzying redwood trees and exploring giant kelp forests with Lizzie as she experiences the wild West Coast of North America; crossing paths with wolves and bears while salmon travel upstream.

The team uncover the hidden lives of three animals; in the Kalahari Desert they put cameras on wild meerkats; in Cameroon, Gordon and scientist Mimi Swift look at a four-year-old orphan chimp; in Argentina, penguins carry cameras far out to sea.

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

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

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.

Trekking through the Canadian rainforest, looking up at dizzying redwood trees and exploring giant kelp forests with Lizzie as she experiences the wild West Coast of North America; crossing paths with wolves and bears while salmon travel upstream.

The team uncover the hidden lives of three animals; in the Kalahari Desert they put cameras on wild meerkats; in Cameroon, Gordon and scientist Mimi Swift look at a four-year-old orphan chimp; in Argentina, penguins carry cameras far out to sea.

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

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

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

Batian organizes a massive translocation of three species, but things don't go according to plan.

The red fox of Prince Edward Island.

Hope prepares for her fundraiser but the spring baby boom starts early; youngest owl; American icon.

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

Batian organizes a massive translocation of three species, but things don't go according to plan.

The red fox of Prince Edward Island.

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.

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

Trek across the Namibian desert with the bush elephant and learn how it keeps its cool in a place with little food or shade; discover how this giant consumes specific plants, digs wells and hikes endless dunes in a quest to find precious water.

Navigate a mangrove forest in Borneo with the saltwater crocodile, which is perfectly suited to life among the watery roots; discover how this reptile uses the environment to regulate its temperature and why its patience makes it a good hunter.

In Borneo, Max discovers the art of nest making with the jungle's master builder: the orangutan; he escapes the insect-filled floor of the rainforest and takes inspiration from this solitary primate's natural engineering prowess.

Tracking chimpanzees through the Rwandan forest with Max, who tries to convince these powerful monkeys that he's a friend, not a foe; key tips on jungle dining and witnessing complex family dynamics, including grooming and socializing.

Trekking through the Canadian rainforest, looking up at dizzying redwood trees and exploring giant kelp forests with Lizzie as she experiences the wild West Coast of North America; crossing paths with wolves and bears while salmon travel upstream.

The team uncover the hidden lives of three animals; in the Kalahari Desert they put cameras on wild meerkats; in Cameroon, Gordon and scientist Mimi Swift look at a four-year-old orphan chimp; in Argentina, penguins carry cameras far out to sea.

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

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

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).

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.

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).

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.

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 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).

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.

The journey down the attraction-packed Niagara River is filled with adventure and beauty; navigating the fascinating history and engineering of this border river between Canada and the United States, arriving at the world-famous Niagara Falls.

An in-depth look at the American shad on its epic journey upstream, back to its fresh water birthplace to spawn.

The bald eagle reigns supreme as the ultimate predator above the waters of Bras d'Or Lake on Canada's eastern shore.

Hope tries to save orphaned fox pups; an owl may be carrying a deadly disease.

The journey down the attraction-packed Niagara River is filled with adventure and beauty; navigating the fascinating history and engineering of this border river between Canada and the United States, arriving at the world-famous Niagara Falls.

An in-depth look at the American shad on its epic journey upstream, back to its fresh water birthplace to spawn.

The bald eagle reigns supreme as the ultimate predator above the waters of Bras d'Or Lake on Canada's eastern shore.

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 journey down the attraction-packed Niagara River is filled with adventure and beauty; navigating the fascinating history and engineering of this border river between Canada and the United States, arriving at the world-famous Niagara Falls.

Penguins live on a tiny, urban cape in South Africa.

During the dry season, the quest for water governs the lives of the animals in South Africa.

The mythology of Ixchel, a protective mother figure.

Hawaiian beaches are created and altered by active volcanoes.

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

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.

Today, more than half of the world's primates are under threat of extinction; meeting the scientists making discoveries about this animal family, and the people safeguarding their future.

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.

Weigh the evolutionary advantages of nature's speed demons and slowpokes.

Today, more than half of the world's primates are under threat of extinction; meeting the scientists making discoveries about this animal family, and the people safeguarding their future.

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.

Weigh the evolutionary advantages of nature's speed demons and slowpokes.

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.

Today, more than half of the world's primates are under threat of extinction; meeting the scientists making discoveries about this animal family, and the people safeguarding their future.

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.

Weigh the evolutionary advantages of nature's speed demons and slowpokes.

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

A plethora of creatures seek refuge from the rise and fall of the tide in Duncan's Cove and the Bay of Fundy.

A look at two very different insect species showcasing their expert pollination skills at Nova Scotia's Annapolis Valley; honey bees and monarch butterflies.

Baby seals and two beautiful birds arrive at Hope for Wildlife.

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

A plethora of creatures seek refuge from the rise and fall of the tide in Duncan's Cove and the Bay of Fundy.

A look at two very different insect species showcasing their expert pollination skills at Nova Scotia's Annapolis Valley; honey bees and monarch butterflies.

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.

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

The fruit and flowers from a rare tree in Africa provide sustenance for the animals during the dry season.

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

The Sandveld has a huge variety of life within its various ecosystems.

The Namaqualand of South Africa briefly transforms every spring from a desert to an oasis.

Today, more than half of the world's primates are under threat of extinction; meeting the scientists making discoveries about this animal family, and the people safeguarding their future.

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.

Weigh the evolutionary advantages of nature's speed demons and slowpokes.

Zambia's wildest places are a paradise for the animals that call them home, including the Luangwa River Valley, the Liuwa Plain and the Kasanka National Park.

An icy October storm complicates the race to the finish line; Big Boi bounces after a stumble before tragedy hits QuadMom; fan fave BoldFace hits her stride despite her clingy kid, Raccoon.

Unraveling the secrets of the most extreme sleepers of the animal kingdom; answering why and how animals sleep, how they deal with sleep deprivation and if animals dream.

Zambia's wildest places are a paradise for the animals that call them home, including the Luangwa River Valley, the Liuwa Plain and the Kasanka National Park.

An icy October storm complicates the race to the finish line; Big Boi bounces after a stumble before tragedy hits QuadMom; fan fave BoldFace hits her stride despite her clingy kid, Raccoon.

Unraveling the secrets of the most extreme sleepers of the animal kingdom; answering why and how animals sleep, how they deal with sleep deprivation and if animals dream.

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.

Zambia's wildest places are a paradise for the animals that call them home, including the Luangwa River Valley, the Liuwa Plain and the Kasanka National Park.

An icy October storm complicates the race to the finish line; Big Boi bounces after a stumble before tragedy hits QuadMom; fan fave BoldFace hits her stride despite her clingy kid, Raccoon.

Unraveling the secrets of the most extreme sleepers of the animal kingdom; answering why and how animals sleep, how they deal with sleep deprivation and if animals dream.

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

Animals that survive in cities.

Cape Breton Highlands National Park faces destruction by various species.

A project goes wrong; Hope tries to save chicks stuck in their shells; searching for orphaned foxes.

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

Animals that survive in cities.

Cape Breton Highlands National Park faces destruction by various species.

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.

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

Elephants in the Lilayi Elephant Nursery and Kafue National Park.

The secrets of Kinda baboons, a newly-identified species that's still little understood.

Territory is home, and the place where animals rest, find food or have their children; many animals mark, protect and defend their small nations against the invasion of strangers because their survival depends on it.

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

Zambia's wildest places are a paradise for the animals that call them home, including the Luangwa River Valley, the Liuwa Plain and the Kasanka National Park.

An icy October storm complicates the race to the finish line; Big Boi bounces after a stumble before tragedy hits QuadMom; fan fave BoldFace hits her stride despite her clingy kid, Raccoon.

Unraveling the secrets of the most extreme sleepers of the animal kingdom; answering why and how animals sleep, how they deal with sleep deprivation and if animals dream.

A look at the wide variety of creatures - both native and invasive - that currently occupy the city of Miami, including peacocks, pythons and parrots.

Chase three young gazelles as they navigate the perils of life in the Serengeti.

Scientists take a look at animal species with the power to transform and restore grasslands.

A look at the wide variety of creatures - both native and invasive - that currently occupy the city of Miami, including peacocks, pythons and parrots.

Chase three young gazelles as they navigate the perils of life in the Serengeti.

Scientists take a look at animal species with the power to transform and restore grasslands.

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.

A look at the wide variety of creatures - both native and invasive - that currently occupy the city of Miami, including peacocks, pythons and parrots.

Chase three young gazelles as they navigate the perils of life in the Serengeti.

Scientists take a look at animal species with the power to transform and restore grasslands.

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.

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

The complicated relationships of crustaceans.

A moose arrives mysteriously; fawns flood the rehab.

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.

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

The complicated relationships of crustaceans.

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.

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.

Exploring marine life off the island of Bonaire; heavy tourism spurs a conservation effort.

Marine protected areas in Florida.

The Monterey Bay National Marine Sanctuary is the largest marine sanctuary in the United States.

A two-year-old Tasmanian Devil named Carlos looks for food and fights for dominance.

A look at the wide variety of creatures - both native and invasive - that currently occupy the city of Miami, including peacocks, pythons and parrots.

Chase three young gazelles as they navigate the perils of life in the Serengeti.

Scientists take a look at animal species with the power to transform and restore grasslands.

The staff steps up to release the few remaining patients, when Hope suffers a personal tragedy.

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.

Follow vet Tim as he races to save rescued koala Ashley; then meet a flying fox with an extra digit who needs some TLC from vet Martine; calculate the odds for a run-over kangaroo joey with vet Emily; then celebrate the release of 50 lorikeets.

The staff steps up to release the few remaining patients, when Hope suffers a personal tragedy.

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.

Follow vet Tim as he races to save rescued koala Ashley; then meet a flying fox with an extra digit who needs some TLC from vet Martine; calculate the odds for a run-over kangaroo joey with vet Emily; then celebrate the release of 50 lorikeets.

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.

The staff steps up to release the few remaining patients, when Hope suffers a personal tragedy.

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.

Follow vet Tim as he races to save rescued koala Ashley; then meet a flying fox with an extra digit who needs some TLC from vet Martine; calculate the odds for a run-over kangaroo joey with vet Emily; then celebrate the release of 50 lorikeets.

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.

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.

A fox needs several surgeries to survive; four raptors leave Hope for Wildlife.

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.

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.

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.

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.

The wildlife rescue team attempt to collar an elephant, save a vervet monkey's leg, and help a baboon fend for herself.

Amanda and Mandy try everything at their disposal to help a snared hyena; the team's plan to release a troop of 13 monkeys is halted by last-minute surgery and some crafty escapees.

A troop of rescue center monkeys that have adopted a litter of stray kittens; a loyal dog helping a rescued raccoon overcome her fears; an emu raised by Irish setters.

Meet more Amazing Animal Friends, including ranch manager Barclay, a Great Dane who happens to be a gifted horse whisperer. In Africa, a tiny marmoset called Thor has become obsessed with two young rescued mongooses.

The staff steps up to release the few remaining patients, when Hope suffers a personal tragedy.

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.

Follow vet Tim as he races to save rescued koala Ashley; then meet a flying fox with an extra digit who needs some TLC from vet Martine; calculate the odds for a run-over kangaroo joey with vet Emily; then celebrate the release of 50 lorikeets.

A look at how Ningaloo's conservation miracle could inspire humans to pull the planet back from the brink of climatic destruction; an abandoned whaling station and other ruins show the tools, if only humans can find the will to change.

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

Meeting a lovey-dovey penguin, a flamingo makeup artist, and a badger making great escapes.

A look at how Ningaloo's conservation miracle could inspire humans to pull the planet back from the brink of climatic destruction; an abandoned whaling station and other ruins show the tools, if only humans can find the will to change.

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

Meeting a lovey-dovey penguin, a flamingo makeup artist, and a badger making great escapes.

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.

A look at how Ningaloo's conservation miracle could inspire humans to pull the planet back from the brink of climatic destruction; an abandoned whaling station and other ruins show the tools, if only humans can find the will to change.

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

Meeting a lovey-dovey penguin, a flamingo makeup artist, and a badger making great escapes.

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.

Canada's east coast experiences all four seasons.

Overpopulation of deer in Hampton, N.B.

A patient moves towards recovery; a mysterious illness kills dozens of animals.

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.

Canada's east coast experiences all four seasons.

Overpopulation of deer in Hampton, N.B.

Scientists and enthusiasts reveal the crucial roles bugs play on the planet and what the future would be without them.

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

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.".

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

Bizarre birds have various adaptations.

Predators must kill to survive, but their next meal is always in question.

Snakes, spiders, and scorpions comprise some of the most venomous creatures in the world.

Sharks are some of the oldest predators still living.

Reptiles have expanded into nearly every habitat in Africa.