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

The marula tree is considered a tree of life in Africa's Manyeleti game reserve.

While some species have passed into extinction, others have recovered and some have even flourished.

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.

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

The marula tree is considered a tree of life in Africa's Manyeleti game reserve.

While some species have passed into extinction, others have recovered and some have even flourished.

An illustration of how the Arctic springs to life after nearly seven months in total darkness.

Animals are being rescued left and right, including a harbor seal, a barred owl, and even a crow; Hope knows the most majestic animals are yet to arrive as the team anticipates the first fawn of the season.

Hope's first fawn of the season is doing better than expected, while a goose receives care at the Burnside Veterinary Hospital following a potentially fatal encounter; more than 60 raccoons are now in rehab.

Deal with heartbreaking cases, including a bald eagle that has mysteriously lost its ability to fly. Watch over a chilled fawn that won't eat, a hummingbird with dangerously sticky wings, and a snapping turtle that got caught in a city reservoir.

An illustration of how the Arctic springs to life after nearly seven months in total darkness.

Animals are being rescued left and right, including a harbor seal, a barred owl, and even a crow; Hope knows the most majestic animals are yet to arrive as the team anticipates the first fawn of the season.

Hope's first fawn of the season is doing better than expected, while a goose receives care at the Burnside Veterinary Hospital following a potentially fatal encounter; more than 60 raccoons are now in rehab.

Aliwal and Sodwana, the Dune Kingdoms.

Cape fur seals breed on Africa's west coast.

Mafia Island, located just off the Tanzanian coastline, is home to diverse marine and terrestrial ecosystems with miles of white beach and clear waters.

The species that call Lake Malawi home have evolved.

Warm waters surround the islands off the coast of Mozambique.

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

Researchers risk everything to unlock secret shark behaviors, 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.

A defenestrated kitty needs a new home, a cat named Bella has mouth issues which may or may not be cancer, and Dr. Savannah takes a trip to the Siksika First Nation to run a spay/neuter clinic to help control the pet population.

A cat named Louis requires major leg surgery, a Kunekune pig named Crumbfoot needs emergency X-rays, and Savannah heads out to conduct a wild horse study, looking at how horses treat their own parasites through a process known as Zoopharmacognosy.

At Liberia's only home for rescued chimpanzees, there are more new arrivals; Jimmy and Jenny Desmond and their team now have 28 chimps to look after, including an 8-week-old baby called Gaia.

A trio of Elephants in Zambia are rescued.

A defenestrated kitty needs a new home, a cat named Bella has mouth issues which may or may not be cancer, and Dr. Savannah takes a trip to the Siksika First Nation to run a spay/neuter clinic to help control the pet population.

A cat named Louis requires major leg surgery, a Kunekune pig named Crumbfoot needs emergency X-rays, and Savannah heads out to conduct a wild horse study, looking at how horses treat their own parasites through a process known as Zoopharmacognosy.

At Liberia's only home for rescued chimpanzees, there are more new arrivals; Jimmy and Jenny Desmond and their team now have 28 chimps to look after, including an 8-week-old baby called Gaia.

A trio of Elephants in Zambia are rescued.

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.

A defenestrated kitty needs a new home, a cat named Bella has mouth issues which may or may not be cancer, and Dr. Savannah takes a trip to the Siksika First Nation to run a spay/neuter clinic to help control the pet population.

A cat named Louis requires major leg surgery, a Kunekune pig named Crumbfoot needs emergency X-rays, and Savannah heads out to conduct a wild horse study, looking at how horses treat their own parasites through a process known as Zoopharmacognosy.

At Liberia's only home for rescued chimpanzees, there are more new arrivals; Jimmy and Jenny Desmond and their team now have 28 chimps to look after, including an 8-week-old baby called Gaia.

A trio of Elephants in Zambia are rescued.

Devon Island in Nunavut is the largest uninhabited island in the world; the icy landscape is so barren that NASA uses it to simulate conditions on Mars.

The first skunk of the year arrives while Dr. Sherri operates on a pigeon's toe, and saves it from infection; the first songbirds of the year are released.

The clinic opens to visitors; starlings are moved; raccoons are released; Dr. Barry tends to an injured beaver.

Cope with injuries caused by human neglect and malice, including a gull that ate a metal shard and animals shot by pellet guns. Celebrate the recovery of two foxes with avian flu and witness the joyous release of 12 robins and a snapping turtle.

Devon Island in Nunavut is the largest uninhabited island in the world; the icy landscape is so barren that NASA uses it to simulate conditions on Mars.

The first skunk of the year arrives while Dr. Sherri operates on a pigeon's toe, and saves it from infection; the first songbirds of the year are released.

The clinic opens to visitors; starlings are moved; raccoons are released; Dr. Barry tends to an injured beaver.

Getting acquainted with an array of ocean oddballs and learning how billions of years' worth of changes have shaped their looks and skills; meeting blind worms who fish, walking sharks, tree-climbing crabs and much more.

Feeling the love in the strange-but-heartwarming partnerships between some of Earth's oddest creatures; diving deep to see strange animals, from snapping shrimp to wolf eels, offer a hand to their fellow ocean-going weirdos to ensure mutual survival.

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

Florida has the most tidal shoreline in the contiguous United States.

Nova Scotia beaches prove a beach needs a balance between opposing forces to thrive.

The mythology of Ixchel, a protective mother figure.

Hawaiian beaches are created and altered by active volcanoes.

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

Human influence and effect on the beaches of California.

Setting sail for New Zealand's Otago Peninsula, a breeding refuge for endangered seabirds and marine mammals; watching as sea lions, albatrosses, red-billed gulls, white-fronted terns and fairy prions find mates, then nurture the next generation.

Untangle, extract, and outwit snakes that have been slithering into the suburbs.

Battle browns, red bellies, and pythons invading Aussie farms.

Returning to South Luangwa to see the new pups born to the mighty Manzi and the tiny-but-fearless Kakumbi packs; yearling Snowy faces a hungry hyena before a lion pride scatters Manzi mum Weka's pups and leaves her frantically searching for them.

There's a lion-hyena showdown with Julz as he hunts for the elusive Manzi pack, who are missing four of their precious pups; Henry from the Zambian Carnivore Programme is on a house call to the Kakumbi den, where another pup has gone AWOL.

Setting sail for New Zealand's Otago Peninsula, a breeding refuge for endangered seabirds and marine mammals; watching as sea lions, albatrosses, red-billed gulls, white-fronted terns and fairy prions find mates, then nurture the next generation.

Untangle, extract, and outwit snakes that have been slithering into the suburbs.

Battle browns, red bellies, and pythons invading Aussie farms.

Returning to South Luangwa to see the new pups born to the mighty Manzi and the tiny-but-fearless Kakumbi packs; yearling Snowy faces a hungry hyena before a lion pride scatters Manzi mum Weka's pups and leaves her frantically searching for them.

There's a lion-hyena showdown with Julz as he hunts for the elusive Manzi pack, who are missing four of their precious pups; Henry from the Zambian Carnivore Programme is on a house call to the Kakumbi den, where another pup has gone AWOL.

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.

Setting sail for New Zealand's Otago Peninsula, a breeding refuge for endangered seabirds and marine mammals; watching as sea lions, albatrosses, red-billed gulls, white-fronted terns and fairy prions find mates, then nurture the next generation.

Untangle, extract, and outwit snakes that have been slithering into the suburbs.

Battle browns, red bellies, and pythons invading Aussie farms.

Returning to South Luangwa to see the new pups born to the mighty Manzi and the tiny-but-fearless Kakumbi packs; yearling Snowy faces a hungry hyena before a lion pride scatters Manzi mum Weka's pups and leaves her frantically searching for them.

There's a lion-hyena showdown with Julz as he hunts for the elusive Manzi pack, who are missing four of their precious pups; Henry from the Zambian Carnivore Programme is on a house call to the Kakumbi den, where another pup has gone AWOL.

Inside the Mackenzie Delta, a transition zone of the boreal forest to the frozen tundra.

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

Inside the Mackenzie Delta, a transition zone of the boreal forest to the frozen tundra.

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.

Discover a city lying beneath the waves, where commuters flood the coral reef's main highways.

Feel the heat of summer's arrival as supersize sea snails try to fend off an invading gang of coral-hungry starfish; accompany reef sharks as they prowl for a midnight meal and marvel at the slippery disguise a parrotfish uses to survive the night.

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.

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.

Shipwrecks in the Caribbean become artificial reefs that support marine life.

The waters near the Florida Keys are home to as many as 1,000 shipwrecks.

Cinematic shipwrecks of the Bahamas.

An island off the coast of Honduras stands out as a holiday resort hot spot, and more than just sun and sand brings the tourists in droves; divers consider the island a paradise of shipwrecks scattered from all corners of the island to explore.

Mexico's Yucatán Peninsula houses ships converted to artificial reefs.

The filmmakers explore the uncommon friendships between people and their unusual wild pets and their fascinating backstories.

Wallabies, koolamana lizards and crocodile hatchlings face the wild river's dangers.

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 filmmakers explore the uncommon friendships between people and their unusual wild pets and their fascinating backstories.

Wallabies, koolamana lizards and crocodile hatchlings face the wild river's dangers.

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.

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.

The filmmakers explore the uncommon friendships between people and their unusual wild pets and their fascinating backstories.

Wallabies, koolamana lizards and crocodile hatchlings face the wild river's dangers.

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 people of Nunavik prepare for the coming winter.

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.

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

The people of Nunavik prepare for the coming winter.

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.

Hippos, elephants, lions and buffalo are drawn to the Zambezi's wild waters, which grow from a tiny trickle in Zambia to the thundering Victoria Falls.

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).

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.

The Wild Coast of South Africa, stretching 170 miles from East London to the KwaZulu-Natal border, consists of rivers that empty into the sea and indigenous forest.

The coastline of Mozambique attracts some of the world's largest filter feeders. Two of Mozambique's leading marine researchers, Andrea Marshall and Nakia Cullan, set out to find one of the ocean's most secretive animals.

Humpbacks and whale sharks visit the coast of Mozambique.

Australia's Great Barrier Reef is one of the natural wonders of the world and the largest living structure on the planet; Monty Halls explores the complexity of the reef itself and the wildlife that lives on it.

Only seven percent of the Great Barrier Reef is coral, and the remainder is a variety of interconnected habitats including the world's oldest jungle, hundreds of islands, mangrove swamps, deep water gardens, sand flats and seagrass.

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

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.

Embark on a journey as Lizzie traverses air, land and sea to encounter Alaskan wildlife and explore some of the world's most remote corners; join scientists eavesdropping on underwater Arctic residents.

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.

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.

Embark on a journey as Lizzie traverses air, land and sea to encounter Alaskan wildlife and explore some of the world's most remote corners; join scientists eavesdropping on underwater Arctic residents.

Programming to be announced.

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.

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

A look at 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.

Programming to be announced.

Embark on a journey as Lizzie traverses air, land and sea to encounter Alaskan wildlife and explore some of the world's most remote corners; join scientists eavesdropping on underwater Arctic residents.

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.

Ninginganiq is so dangerous that even seasoned sailors keep away.

Various parks around Africa.

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

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

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

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

Ninginganiq is so dangerous that even seasoned sailors keep away.

Various parks around Africa.

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

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

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.

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

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 moose and wolves of Lake Superior battle.

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.

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

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

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

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

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

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

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

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.

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

Embark on a journey as Lizzie traverses air, land and sea to encounter Alaskan wildlife and explore some of the world's most remote corners; join scientists eavesdropping on underwater Arctic residents.

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

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.

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.

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.

Almost all the species that inhabit the Earth seek out mates to ensure the survival of their kind through reproduction; but while some mate for life, others live in fleeting moments.

Chris Packham investigates how nature's masterminds measure up against human brainpower; he explores how different animals, such as ravens, crows, bees and starlings, can use tools and solve complex puzzles.

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 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.

Almost all the species that inhabit the Earth seek out mates to ensure the survival of their kind through reproduction; but while some mate for life, others live in fleeting moments.

Chris Packham investigates how nature's masterminds measure up against human brainpower; he explores how different animals, such as ravens, crows, bees and starlings, can use tools and solve complex puzzles.

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.

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.

Almost all the species that inhabit the Earth seek out mates to ensure the survival of their kind through reproduction; but while some mate for life, others live in fleeting moments.

Chris Packham investigates how nature's masterminds measure up against human brainpower; he explores how different animals, such as ravens, crows, bees and starlings, can use tools and solve complex puzzles.

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

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.

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

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

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.

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

A look at the 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.

South Africa's Drakensberg is home to climatic and ecological gradients.

Towering mountains line Lake Manyara National Park.

Grass-grazing geladas, elusive wolves and horned walia ibex reside in the highest peaks in Africa.

Resilient creatures reside in one of the most arid environments on Earth.

When the Etosha pan fills with water in the summer, water birds congregate to breed.

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.

Almost all the species that inhabit the Earth seek out mates to ensure the survival of their kind through reproduction; but while some mate for life, others live in fleeting moments.

Chris Packham investigates how nature's masterminds measure up against human brainpower; he explores how different animals, such as ravens, crows, bees and starlings, can use tools and solve complex puzzles.

Get to know the Waterfront Pride: males Tom Tom and Caller, 8 lionesses, 10 youths, and Einstein, the grown cub who never left home; Einstein's defiance catches up with him when rivals from the Outsiders Pride make a play that seals his fate.

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

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.

Get to know the Waterfront Pride: males Tom Tom and Caller, 8 lionesses, 10 youths, and Einstein, the grown cub who never left home; Einstein's defiance catches up with him when rivals from the Outsiders Pride make a play that seals his fate.

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

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 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.

Get to know the Waterfront Pride: males Tom Tom and Caller, 8 lionesses, 10 youths, and Einstein, the grown cub who never left home; Einstein's defiance catches up with him when rivals from the Outsiders Pride make a play that seals his fate.

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

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.

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

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

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

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.

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.

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

Every year, up to 80 polar bears gather on the frozen shores of Barter Island on the Arctic coast of Alaska.

Stage one of the competition kicks off with seven ravenous bears post-hibernation; tiny Stomper vies for power and Blondie's love, grizzled vet Bernie brawls with clueless teen Casanova and new mom BoldFace battles wolves.

The Stage 1 winners and some tough new recruits dash to cash on July's salmon feast; BigBoi embarks on a food-finding road trip, QuadMom and RedBack are welcomed to the feast and BoldFace keeps her surviving cub safe.

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.

Get to know the Waterfront Pride: males Tom Tom and Caller, 8 lionesses, 10 youths, and Einstein, the grown cub who never left home; Einstein's defiance catches up with him when rivals from the Outsiders Pride make a play that seals his fate.

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

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 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.

Five desert lions come of age in the African Namib.

The wild counterparts of domesticated species.

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.

Five desert lions come of age in the African Namib.

The wild counterparts of domesticated species.

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

The 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.

Five desert lions come of age in the African Namib.

The wild counterparts of domesticated species.

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.

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.

A moose arrives mysteriously; fawns flood the rehab.

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.

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.

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

Elands lock corkscrew horns; storks rattle sabre-shaped beaks; rhinos scare the competition with big horns; striped marlins spear unsuspecting prey.

Tasmanian devils get into food fights with rivals; how dung beetles roll over the competition; wild boars' fierce mating strategies; hyenas' bone-crushing teeth demolish any meal.

The blonde manes of golden snub-nose monkeys; pink flamingo feathers brought on by an all-crustacean diet; the markings of gemsboks and cheetahs.

A gorilla wrestling match, pushy moose antlers, long pelican bills that snap at any enemy within range, and a megashark's stereo sniffer.

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

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

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

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

The story of two mothers, a crocodile and a hippopotamus, as they face the perils of raising a family in this beautiful, remote location of Katuma.

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.

Five desert lions come of age in the African Namib.

The wild counterparts of domesticated species.

A guinea pig named JT has a life-threatening tooth issue, a duck named Dick has a septic joint that needs cleaning, and Savannah and Dayle head to La Ronge, SK. to speak to a class of high schoolers and mentor the next generation of veterinarians.

An elderly dog named Layne needs tests to see if she's stable enough for surgery; a cow suffers from a prolapsed uterus; Lil shows up with a couple of creatures that need the team's help before they can be released back into the wild.

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.

Elephants in Camp Phoenix in Zambia's Kafue National Park.

A guinea pig named JT has a life-threatening tooth issue, a duck named Dick has a septic joint that needs cleaning, and Savannah and Dayle head to La Ronge, SK. to speak to a class of high schoolers and mentor the next generation of veterinarians.

An elderly dog named Layne needs tests to see if she's stable enough for surgery; a cow suffers from a prolapsed uterus; Lil shows up with a couple of creatures that need the team's help before they can be released back into the wild.

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.

Elephants in Camp Phoenix in Zambia's Kafue National Park.

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

A guinea pig named JT has a life-threatening tooth issue, a duck named Dick has a septic joint that needs cleaning, and Savannah and Dayle head to La Ronge, SK. to speak to a class of high schoolers and mentor the next generation of veterinarians.

An elderly dog named Layne needs tests to see if she's stable enough for surgery; a cow suffers from a prolapsed uterus; Lil shows up with a couple of creatures that need the team's help before they can be released back into the wild.

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.

Elephants in Camp Phoenix in Zambia's Kafue National Park.

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.

Bizarre birds have various adaptations.

Some survival adaptations make creatures ugly.

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

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.

Bizarre birds have various adaptations.

Some survival adaptations make creatures ugly.

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

Embracing an invasive nutria who's become a part of the family; paddling around with Gumbo the goose; visiting a blind hedgehog and his human chum; exploring a swimmer's bond with wild gray seals.

A duck that won't go in the water without a ride from her pooch pal, an elephant that thinks she's a buffalo and a herd of cows that adopt an orphaned deer.

Meeting Charlotte, a schnauzer who enjoys bath time with her guinea pig pal Wallace and a randy ram called Hamish who likes to sneak off to live with a herd of dairy cows instead of his own kind.

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.

A guinea pig named JT has a life-threatening tooth issue, a duck named Dick has a septic joint that needs cleaning, and Savannah and Dayle head to La Ronge, SK. to speak to a class of high schoolers and mentor the next generation of veterinarians.

An elderly dog named Layne needs tests to see if she's stable enough for surgery; a cow suffers from a prolapsed uterus; Lil shows up with a couple of creatures that need the team's help before they can be released back into the wild.

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.

Elephants in Camp Phoenix in Zambia's Kafue National Park.

Uncovering a land of opposites atop New Zealand's South Island, where one of the world's longest sandbars attracts bar-tailed godwits and hungry pilot whales, and drowned river valleys provide a buffet for dusky dolphins and New Zealand fur seals.

Old friends and a breakaway Manzi trio; Kakumbi make a kill.

Julz and Henry from the ZCP track the Kakumbi pups, who face off with a stubborn, razor-tusked warthog; Thandie Mweetwa, ZCP's lion specialist, counts the prides that are pushing the Manzi out of their territory.

Tangle with a leopard; exploring mealtime hierarchy and witnessing a sad vigil.

Grieving the lost Kakumbi pups; the Manzi pack repels big predators.

Uncovering a land of opposites atop New Zealand's South Island, where one of the world's longest sandbars attracts bar-tailed godwits and hungry pilot whales, and drowned river valleys provide a buffet for dusky dolphins and New Zealand fur seals.

Old friends and a breakaway Manzi trio; Kakumbi make a kill.

Julz and Henry from the ZCP track the Kakumbi pups, who face off with a stubborn, razor-tusked warthog; Thandie Mweetwa, ZCP's lion specialist, counts the prides that are pushing the Manzi out of their territory.

Tangle with a leopard; exploring mealtime hierarchy and witnessing a sad vigil.

Grieving the lost Kakumbi pups; the Manzi pack repels big predators.

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

Uncovering a land of opposites atop New Zealand's South Island, where one of the world's longest sandbars attracts bar-tailed godwits and hungry pilot whales, and drowned river valleys provide a buffet for dusky dolphins and New Zealand fur seals.

Old friends and a breakaway Manzi trio; Kakumbi make a kill.

Julz and Henry from the ZCP track the Kakumbi pups, who face off with a stubborn, razor-tusked warthog; Thandie Mweetwa, ZCP's lion specialist, counts the prides that are pushing the Manzi out of their territory.

Tangle with a leopard; exploring mealtime hierarchy and witnessing a sad vigil.

Grieving the lost Kakumbi pups; the Manzi pack repels big predators.

The various methods of raising young, from large groups to single parents.

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

Recent research into bird-like qualities of dinosaurs.

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

The various methods of raising young, from large groups to single parents.

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

Recent research into bird-like qualities of dinosaurs.

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

Aliwal and Sodwana, the Dune Kingdoms.

Cape fur seals breed on Africa's west coast.

Mafia Island, located just off the Tanzanian coastline, is home to diverse marine and terrestrial ecosystems with miles of white beach and clear waters.

The species that call Lake Malawi home have evolved.

Warm waters surround the islands off the coast of Mozambique.

Uncovering a land of opposites atop New Zealand's South Island, where one of the world's longest sandbars attracts bar-tailed godwits and hungry pilot whales, and drowned river valleys provide a buffet for dusky dolphins and New Zealand fur seals.

Old friends and a breakaway Manzi trio; Kakumbi make a kill.

Julz and Henry from the ZCP track the Kakumbi pups, who face off with a stubborn, razor-tusked warthog; Thandie Mweetwa, ZCP's lion specialist, counts the prides that are pushing the Manzi out of their territory.

Tangle with a leopard; exploring mealtime hierarchy and witnessing a sad vigil.

Grieving the lost Kakumbi pups; the Manzi pack repels big predators.