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

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

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.".

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

A fox undergoes surgery; the marine mammals begin to move outside; the deer enclosure fills up with orphaned fawns.

The team tries to help a stranded sunfish.

Hope and Dr. Barry discover a horrifying problem in Costa Rica where man and monkey cross paths.

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

A fox undergoes surgery; the marine mammals begin to move outside; the deer enclosure fills up with orphaned fawns.

The team tries to help a stranded sunfish.

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

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

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

The summer solstice drives macaques into cool water and makes cranes dance on the chilly plateau.

Sea lions, yellow-eyed penguins and dolphins make the most of extra feeding time.

Mother's Day means the beginning of the dry season in Sri Lanka and the end of it in India.

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

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.".

The animals are willing to do whatever it takes to protect their food, young ones, and territories. Some of their strategies can put the smartest of human beings in the shade.

Coasts are gateways from land to sea, offering opportunities to many creatures.

A journey across Madagascar uncovers the unique and incredible wildlife it has to offer, from its famed lemurs to chameleons.

The animals are willing to do whatever it takes to protect their food, young ones, and territories. Some of their strategies can put the smartest of human beings in the shade.

Coasts are gateways from land to sea, offering opportunities to many creatures.

A journey across Madagascar uncovers the unique and incredible wildlife it has to offer, from its famed lemurs to chameleons.

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

The animals are willing to do whatever it takes to protect their food, young ones, and territories. Some of their strategies can put the smartest of human beings in the shade.

Coasts are gateways from land to sea, offering opportunities to many creatures.

A journey across Madagascar uncovers the unique and incredible wildlife it has to offer, from its famed lemurs to chameleons.

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.

Hope attempts to reunite a fawn with its mother; an eagle recovers from an infestation.

Hope's three bobcats get released into the wild, and the second baby barred owl arrives.

A bird is in trouble, but is it wildlife? Spring patients are ready to return to the wild.

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.

Hope attempts to reunite a fawn with its mother; an eagle recovers from an infestation.

Hope's three bobcats get released into the wild, and the second baby barred owl arrives.

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

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.

Live through a sunny tropical September day with creatures from Polynesia.

On the first day of spring in Australia, creatures look for either dinner or a date, ranging from kangaroos in the grasslands to koalas in the trees and freshwater crocodiles.

In Madagascar, meet unique primates and reptiles searching for water and dodging predators, from ring-tailed lemurs in the rainforests to tiny brown leaf chameleons in a land of extreme climate variations and habitats.

The sun rules everything on the arid Arabian Peninsula where lizards and camels have adapted to withstand intense conditions; rare hyrax and chameleons forage in more moderate southern mountains.

The animals are willing to do whatever it takes to protect their food, young ones, and territories. Some of their strategies can put the smartest of human beings in the shade.

Coasts are gateways from land to sea, offering opportunities to many creatures.

A journey across Madagascar uncovers the unique and incredible wildlife it has to offer, from its famed lemurs to chameleons.

Adapt or perish in the coral streets as higher-than-normal temperatures make autumn cooling more difficult; shack up with a clownfish family and their sea anemone landlord, then see cleaner fish give manta rays a day at the spa.

Roaming across America with a road-tripping chicken and meeting a mouse family living in an English garden; beating arachnophobia with a spider's help; trekking with the guardian of Earth's last two northern white rhinos.

Cockatoos and platypuses inspire new careers; a shared trauma bonds a human and an elephant for life; George the turkey vulture gets playful; a farewell to human-raised kangaroos.

Adapt or perish in the coral streets as higher-than-normal temperatures make autumn cooling more difficult; shack up with a clownfish family and their sea anemone landlord, then see cleaner fish give manta rays a day at the spa.

Roaming across America with a road-tripping chicken and meeting a mouse family living in an English garden; beating arachnophobia with a spider's help; trekking with the guardian of Earth's last two northern white rhinos.

Cockatoos and platypuses inspire new careers; a shared trauma bonds a human and an elephant for life; George the turkey vulture gets playful; a farewell to human-raised kangaroos.

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

Adapt or perish in the coral streets as higher-than-normal temperatures make autumn cooling more difficult; shack up with a clownfish family and their sea anemone landlord, then see cleaner fish give manta rays a day at the spa.

Roaming across America with a road-tripping chicken and meeting a mouse family living in an English garden; beating arachnophobia with a spider's help; trekking with the guardian of Earth's last two northern white rhinos.

Cockatoos and platypuses inspire new careers; a shared trauma bonds a human and an elephant for life; George the turkey vulture gets playful; a farewell to human-raised kangaroos.

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

Three healthy, orphaned baby raccoons arrive; Justine the beaver returns; a raccoon arrives in a predicament.

The rehab is abuzz as Hope's open house approaches; a release at the birthplace of hockey goes offside; a deer doesn't want to depart.

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

Three healthy, orphaned baby raccoons arrive; Justine the beaver returns; a raccoon arrives in a predicament.

Congratulating the new Orangutan Jungle School graduates, who aren't all spring chickens; following the convoy to the release site, where the team bids their friends a poignant farewell; enjoying the celebrations as Molly and Bumi move up a grade.

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 islands' natural rhythms and challenges of new life unfold in this wild outpost; turtles return to nesting sites, rival iguanas compete for mates and albatrosses perform courtship dances.

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

A veteran pair of ospreys return home to a Connecticut salt marsh; over one summer they must battle their enemies, withstand the elements and hunt hundreds of fish, all to raise the next generation of sea raptors.

Exploring pine forests, coral reefs and the Everglades to find out what scientists are doing to protect alligators, mini deer, manatees and other vulnerable species from human and animal invaders.

Adapt or perish in the coral streets as higher-than-normal temperatures make autumn cooling more difficult; shack up with a clownfish family and their sea anemone landlord, then see cleaner fish give manta rays a day at the spa.

Roaming across America with a road-tripping chicken and meeting a mouse family living in an English garden; beating arachnophobia with a spider's help; trekking with the guardian of Earth's last two northern white rhinos.

Cockatoos and platypuses inspire new careers; a shared trauma bonds a human and an elephant for life; George the turkey vulture gets playful; a farewell to human-raised kangaroos.

Jimmy and Jenny Desmond and their team are at breaking point, with 38 chimps to look after; losing one of them to illness leaves the team more determined than ever to build them all a new sanctuary where they can live like wild chimps.

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.

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.

Jimmy and Jenny Desmond and their team are at breaking point, with 38 chimps to look after; losing one of them to illness leaves the team more determined than ever to build them all a new sanctuary where they can live like wild chimps.

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.

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.

Congratulating the new Orangutan Jungle School graduates, who aren't all spring chickens; following the convoy to the release site, where the team bids their friends a poignant farewell; enjoying the celebrations as Molly and Bumi move up a grade.

Jimmy and Jenny Desmond and their team are at breaking point, with 38 chimps to look after; losing one of them to illness leaves the team more determined than ever to build them all a new sanctuary where they can live like wild chimps.

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.

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.

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.

A fawn in need of CPR interrupts the annual fox release; the owls and a seal make great strides.

The team races to save a raccoon covered in oil; a silver fox recovers after a vehicle collision.

Hope Swinimer rescues, rehabilitates and releases thousands of animals each year, while struggling to make ends meet; she is driven by her compassion and belief that every animal matters.

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.

A fawn in need of CPR interrupts the annual fox release; the owls and a seal make great strides.

The team races to save a raccoon covered in oil; a silver fox recovers after a vehicle collision.

An introduction to some of the big characters including "class clown" Valentino and "Big Boy" Beni; an emergency arrival of teenage mom Clara and her baby Clarita; vets round up the older orangutans, who are now ready to be released.

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.

Winter in Marakele National Park is one of the scarcest, but also most plentiful, times of the year; looking at how a giraffe's demise becomes a source of life for the region's vultures, who depend on the decaying flesh of animals like these.

Cape Town, South Africa is home to twenty types of frogs, but many are threatened by urban development; following western leopard toads on their tenuous journey to breed in the city's shrinking wetlands.

Once superabundant, African Elephant populations have declined drastically due to hunting; getting an in-depth look into the lives of these powerful land mammals, and seeing what parks like Addo and Tembe are doing to preserve their future.

Surviving the African savanna requires guile and teamwork for species who live in packs; following a day in the life of African wild dogs and dwarf mongooses to see how they rely on their tight-knit families to overcome the challenging landscape.

Jimmy and Jenny Desmond and their team are at breaking point, with 38 chimps to look after; losing one of them to illness leaves the team more determined than ever to build them all a new sanctuary where they can live like wild chimps.

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.

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.

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.

The wildlife hospital is swamped after a major flood crisis in Brisbane.

An operation for a critical koala and rainbow lorikeets create chaos.

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.

The wildlife hospital is swamped after a major flood crisis in Brisbane.

An operation for a critical koala and rainbow lorikeets create chaos.

An introduction to some of the big characters including "class clown" Valentino and "Big Boy" Beni; an emergency arrival of teenage mom Clara and her baby Clarita; vets round up the older orangutans, who are now ready to be released.

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.

The wildlife hospital is swamped after a major flood crisis in Brisbane.

An operation for a critical koala and rainbow lorikeets create chaos.

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.

The team prepares for the annual open house; Aislyn spends her last day organizing the second raccoon roundup.

Hope prepares for the annual open house, but approaching rainstorms threaten the event.

A rare owl appears ready for release but everyone wonders if it will fly.

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.

The team prepares for the annual open house; Aislyn spends her last day organizing the second raccoon roundup.

Hope prepares for the annual open house, but approaching rainstorms threaten the event.

"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.

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.

The St. Lawrence River is one that forged North America, allowing ships to traverse the continent; the adventure begins in Canada's first capital city of Kingston and near Canada's second-largest city of Montreal.

Navigating the historic Potomac River from West Virginia to Chesapeake Bay, passing through Washington, D.C. and the national monuments and ending at George Washington's Mount Vernon estate.

A journey down one of the wild rivers in the world, the Yukon; the unusual trip starts in an aircraft piloted by a painter and the odyssey ends with a visit to a graveyard of disintegrating rear-wheel steamers.

Meandering through the black waters of a primordial river immortalized in a folk song.

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.

The wildlife hospital is swamped after a major flood crisis in Brisbane.

An operation for a critical koala and rainbow lorikeets create chaos.

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.

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

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.

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.

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

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.

"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.

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.

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

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.

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 crew deals with emergencies in the bone-chilling cold; a herd of white-tailed deer is released.

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

Two tiny orphans struggle to survive; Hope takes a second swing at a release gone wrong.

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 crew deals with emergencies in the bone-chilling cold; a herd of white-tailed deer is released.

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

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.

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 kangaroos that populate the woodlands, pastures and forests of Australia cluster together in groups known as mobs.

Aggressive predators, extreme weather and lively joeys can make it challenging for mother kangaroos.

Male kangaroos, also known as bucks, face both risk and reward in their drive to secure their species.

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

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.

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

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.

Prepare for the summer cubs' release with Roger; meet Ace and Little Blueberry, two newbies with serious health issues who will have to stay over the winter with the Z cubs; six happy, healthy bears embark on their new lives in the wild.

A first-person look at the lives of ocean creatures including sharks, elephant seals, turtles and gannets.

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.

Prepare for the summer cubs' release with Roger; meet Ace and Little Blueberry, two newbies with serious health issues who will have to stay over the winter with the Z cubs; six happy, healthy bears embark on their new lives in the wild.

A first-person look at the lives of ocean creatures including sharks, elephant seals, turtles and gannets.

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.

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.

Prepare for the summer cubs' release with Roger; meet Ace and Little Blueberry, two newbies with serious health issues who will have to stay over the winter with the Z cubs; six happy, healthy bears embark on their new lives in the wild.

A first-person look at the lives of ocean creatures including sharks, elephant seals, turtles and gannets.

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.

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

Bizarre birds have various adaptations.

Some survival adaptations make creatures ugly.

A most unusual fawn arrives on Hope's doorstep; a graveyard is the spooky setting for an unlikely reunion.

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

Bizarre birds have various adaptations.

Some survival adaptations make creatures ugly.

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.

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

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.

Cabo Pulmo is the site of an extraordinary marine recovery.

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

Prepare for the summer cubs' release with Roger; meet Ace and Little Blueberry, two newbies with serious health issues who will have to stay over the winter with the Z cubs; six happy, healthy bears embark on their new lives in the wild.

A first-person look at the lives of ocean creatures including sharks, elephant seals, turtles and gannets.

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.

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

Navigating the harsh Mongolian wilderness with Dan as he searches for The Dude, the largest snow leopard ever recorded; he battles hostile landscapes and uncertainty as he sheds light on the challenges that The Dude and other snow leopards face.

Navigating the harsh Mongolian wilderness with Dan O'Neill as he searches for the Dude, the largest snow leopard ever recorded.

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

Navigating the harsh Mongolian wilderness with Dan as he searches for The Dude, the largest snow leopard ever recorded; he battles hostile landscapes and uncertainty as he sheds light on the challenges that The Dude and other snow leopards face.

Navigating the harsh Mongolian wilderness with Dan O'Neill as he searches for the Dude, the largest snow leopard ever recorded.

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.

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

Navigating the harsh Mongolian wilderness with Dan as he searches for The Dude, the largest snow leopard ever recorded; he battles hostile landscapes and uncertainty as he sheds light on the challenges that The Dude and other snow leopards face.

Navigating the harsh Mongolian wilderness with Dan O'Neill as he searches for the Dude, the largest snow leopard ever recorded.

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.

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

Recent research into bird-like qualities of dinosaurs.

Two members of Hope's team travel to England to discover new techniques and make allies on the front lines of animal rescue.

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.

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

Recent research into bird-like qualities of dinosaurs.

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.

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.

Stories of how animals react to Earth's extremes, from humpback whales to tiny butterflies and savanna chimpanzees.

From the Galapagos Islands to the edge of Antarctica, island wildlife reveal insights into the rapidly changing planet.

Animals go to extraordinary lengths to survive in the hottest and driest extremes, from the Sahara Desert to Australia.

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.

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

Navigating the harsh Mongolian wilderness with Dan as he searches for The Dude, the largest snow leopard ever recorded; he battles hostile landscapes and uncertainty as he sheds light on the challenges that The Dude and other snow leopards face.

Navigating the harsh Mongolian wilderness with Dan O'Neill as he searches for the Dude, the largest snow leopard ever recorded.

The animal families in Serengeti stick together, share food, and play around in the grasslands. The young ones get acquainted with the ways of the wild.

Uncover the profound significance and uncertain future of our rivers.

Twice the size of the British Isles, Borneo is the third largest island on Earth and home to possibly the greatest diversity of life of any island, from flying lizards sun bears to orangutans.

The animal families in Serengeti stick together, share food, and play around in the grasslands. The young ones get acquainted with the ways of the wild.

Uncover the profound significance and uncertain future of our rivers.

Twice the size of the British Isles, Borneo is the third largest island on Earth and home to possibly the greatest diversity of life of any island, from flying lizards sun bears to orangutans.

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.

The animal families in Serengeti stick together, share food, and play around in the grasslands. The young ones get acquainted with the ways of the wild.

Uncover the profound significance and uncertain future of our rivers.

Twice the size of the British Isles, Borneo is the third largest island on Earth and home to possibly the greatest diversity of life of any island, from flying lizards sun bears to orangutans.

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.

Animals that have evolved unusual abilities.

The red fox of Prince Edward Island.

Barry and Hayley's adventure in the UK continues at a rehab center where they use the latest in alternative therapies.

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.

Animals that have evolved unusual abilities.

The red fox of Prince Edward Island.

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.

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.

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

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.

A look at the astonishing wildlife, landscapes and people of the Nile, the world's longest river; from elephants and leopards, to extreme kayakers and ancient wonders, its great length is a lifeline for astonishing wildlife and cultures.

The Mississippi, from frozen waterfalls to time-traveling barges, from busy beavers to mysterious swamps, connects a continent like no other river. At the end of its 3,500-mile journey, it creates one of the biggest river deltas on the planet.

The animal families in Serengeti stick together, share food, and play around in the grasslands. The young ones get acquainted with the ways of the wild.

Uncover the profound significance and uncertain future of our rivers.

Twice the size of the British Isles, Borneo is the third largest island on Earth and home to possibly the greatest diversity of life of any island, from flying lizards sun bears to orangutans.

Get chills as winter descends, slowing down life on the bustling reef; meander with reef sharks and octopuses, visit a coral oasis atop an old shipwreck, and spot a banded snake eel's talent for identity theft when it disguises itself as a predator.

Exploring the softer side of Tasmanian devils; meeting a pioneering sea turtle and enjoying family dinner with Buttons, the deer; playing football with a bull.

Flapping around with Banksi the fruit bat and his human surrogate mom; eyeing a mischievous emu; celebrating a pig's rescue-versary; touring manatee heaven; learning to speak baboon with Dingani.

Get chills as winter descends, slowing down life on the bustling reef; meander with reef sharks and octopuses, visit a coral oasis atop an old shipwreck, and spot a banded snake eel's talent for identity theft when it disguises itself as a predator.

Exploring the softer side of Tasmanian devils; meeting a pioneering sea turtle and enjoying family dinner with Buttons, the deer; playing football with a bull.

Flapping around with Banksi the fruit bat and his human surrogate mom; eyeing a mischievous emu; celebrating a pig's rescue-versary; touring manatee heaven; learning to speak baboon with Dingani.

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.

Get chills as winter descends, slowing down life on the bustling reef; meander with reef sharks and octopuses, visit a coral oasis atop an old shipwreck, and spot a banded snake eel's talent for identity theft when it disguises itself as a predator.

Exploring the softer side of Tasmanian devils; meeting a pioneering sea turtle and enjoying family dinner with Buttons, the deer; playing football with a bull.

Flapping around with Banksi the fruit bat and his human surrogate mom; eyeing a mischievous emu; celebrating a pig's rescue-versary; touring manatee heaven; learning to speak baboon with Dingani.

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.

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.

A bobcat kitten needs Hope's help but this little orphan causes big headaches.

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.

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.

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.

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.

A southern African mangrove forest experiences the changes between high and low tide.

The Okavango Delta is home to a wide variety of African wildlife.

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.

Get chills as winter descends, slowing down life on the bustling reef; meander with reef sharks and octopuses, visit a coral oasis atop an old shipwreck, and spot a banded snake eel's talent for identity theft when it disguises itself as a predator.

Exploring the softer side of Tasmanian devils; meeting a pioneering sea turtle and enjoying family dinner with Buttons, the deer; playing football with a bull.

Flapping around with Banksi the fruit bat and his human surrogate mom; eyeing a mischievous emu; celebrating a pig's rescue-versary; touring manatee heaven; learning to speak baboon with Dingani.