Sharks have adapted to thrive in extreme places.

Witnessing clashes over precious resources when the dry season brings a band of gladiators to an African savannah watering hole; a lion-elephant territory brawl, an ant raid on a termite mound and a honey badger's risky dance with a deadly snake.

A look at whether Australian animals' weapons, such as the kangaroo's boxing moves and the redback spider's traps, can help them survive climate change.

Waters flood the prairies, mangroves and marshes.

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

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

Stay up late as the northern team attaches an activity tag to a bull shark and finds out what this night owl does after sunset. Then dive 80 metres deep with the southern team, who are hoping to put a satellite tracker on a female great white.

Contemplating shark community hierarchies as the northern team studies how young blacktips learn social and survival skills; rushing to Rainbow Beach with the southern team, who are eager to witness the sand tiger shark's mating.

Traveling to the ends of Australia's shark highways; finding out if Greenly Island in the south is a truck stop for migrating great whites; searching for proof of a genetic connection between northern bull sharks and their cooler-climate cousins.

The southern team tests new migration tech and tools that could reduce shark attacks in a popular snorkeling spot; the northern team catches and tags bull sharks to help local swimmers steer clear of birthing mothers.

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

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

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

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

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

Primates, like lemurs and baboons, display adaptability and resilience in their day-to-day lives on their quest for food and shelter.

The baboon has adapted to become one of Africa's most successful and dominant primates.

Red Colobus Monkeys on the island of Zanzibar.

May brings violent tornados to North America and the life-giving monsoon to India; the dry season ends in southern Africa, claiming victims among elephants.

In July, Arctic ice sheets crash into the sea while an arctic fox hunts among the rocks. In Africa, herds wildebeest cross the croc-infested Mara river.

Sharks have adapted to thrive in extreme places.

Witnessing clashes over precious resources when the dry season brings a band of gladiators to an African savannah watering hole; a lion-elephant territory brawl, an ant raid on a termite mound and a honey badger's risky dance with a deadly snake.

A look at whether Australian animals' weapons, such as the kangaroo's boxing moves and the redback spider's traps, can help them survive climate change.

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

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

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

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

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

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

Gros Morne National Park is the result of continental collision.

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

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

A comprehensive overview of the mind-boggling character traits exhibited by different species of animals when it comes to mating.

An unvarnished and fascinating insight into some lesser-known character traits exhibited by different species of animals when they are in need of food.

An up-close look at the character traits exhibited by different species of animals when it comes to survival amid any kind of perceived danger.

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.

Hope tries to stop the outbreak from spreading; decisions to save Hope for Wildlife.

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

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

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

Hope tries to stop the outbreak from spreading; decisions to save Hope for Wildlife.

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

The unlikely collaborators working to ensure mutual survival in the Kalahari Basin; an elephant clan's symbiotic link to fruiting anaboom trees, a meerkat's alliance with a feisty drongo bird, and more flora-and-fauna odd couples.

Thirst for rain alongside the animals of the Kalahari as elephant herds cooperate, and meerkat's adopt a strange babysitter in the depths of a brutally dry year.

Track scientists arrive in the Kalahari to test the hypothesis that animal collaboration is the key to the dizzying diversity of the region's species; they monitor behavior, decipher data, and deliver conclusions.

The Savanna's woodland of southern Africa is a unique ecosystem in the world; a great amount of branches and bushes have created a dark maze, where predators and preys are in a continuous state of tension; visibility is little.

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

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

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

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

Dr. Amanda rescues a blind pet baboon, and Dr. Charlotte performs a tricky surgery on a pangolin whose leg must be amputated after a run-in with poachers.

Stage 1 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.

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

Dr. Amanda rescues a blind pet baboon, and Dr. Charlotte performs a tricky surgery on a pangolin whose leg must be amputated after a run-in with poachers.

Stage 1 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 crew explores the Atacama Desert, the world's driest non-polar region.

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

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

Chris Packham reveals some of the cleverest animal communicators on the planet; for decades, people have longed to emulate Dr. Dolittle and be able to understand what animals are communicating to one another.

Chris reveals some of the best animal builders in the world, a group that is incredibly varied; accomplished animal architects include everything from beavers to bees and prairie dogs to bowerbirds.

Chris Packham looks at social intelligence in the animal kingdom, and finds out why it is that, for animals, being together means being clever; he looks at how lions hunt in teams, in which each holds a very specific position.

Chris Packham reveals the intelligent cons and deceitful behavior that animals use to survive and prosper in the game of life, from disguising themselves to outwit predators, to kidnapping babies to save their own offspring.

A look at the care, cleaning and feeding of the animals; a patient refuses to leave.

Clear waters, deep reefs, and dangerous caves.

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

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

A look at the care, cleaning and feeding of the animals; a patient refuses to leave.

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.

Visiting Penny the pigeon and her rescuer; getting a buzz from a refugee who finds comfort in beekeeping; diving with a shark dancer.

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.

Liz Bonnin uncovers the weird and wonderful ways animals attract a mate.

Liz Bonnin explores whether animals of different species can fall in love.

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

Dr. Amanda rescues a blind pet baboon, and Dr. Charlotte performs a tricky surgery on a pangolin whose leg must be amputated after a run-in with poachers.

Stage 1 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.

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

Stay up late as the northern team attaches an activity tag to a bull shark and finds out what this night owl does after sunset. Then dive 80 metres deep with the southern team, who are hoping to put a satellite tracker on a female great white.

Contemplating shark community hierarchies as the northern team studies how young blacktips learn social and survival skills; rushing to Rainbow Beach with the southern team, who are eager to witness the sand tiger shark's mating.

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

Stay up late as the northern team attaches an activity tag to a bull shark and finds out what this night owl does after sunset. Then dive 80 metres deep with the southern team, who are hoping to put a satellite tracker on a female great white.

Contemplating shark community hierarchies as the northern team studies how young blacktips learn social and survival skills; rushing to Rainbow Beach with the southern team, who are eager to witness the sand tiger shark's mating.

A feature on the Andean Altiplano, a rugged plain in Bolivia.

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

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

Chris discovers the cleverest animal travellers and how they find their way, from deer with mental maps, blue whales' planning routes, and dung beetles navigating by the stars.

A family of lemurs in the rainforest of Mantadia National Park.

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.

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.

Hope says goodbye to two celebrated patients; the grim reality of wildlife rehabilitation.

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.

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.

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

Winter is the ultimate challenge. As temperatures plunge across much of America, some animals escape to milder climes of the South, while others stay put and tough out the brutal cold and blizzards that blanket the North.

Animals living in the harsh conditions of the mountain peaks.

Admire arctic animals' secret superpowers of survival.

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

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.

In September, seasonal swings activate change across the natural world.

Coming full circle on this wild year on Earth.

Arctic winds plunge the polar bear into a deep freeze, while in Australia, the heat means a feast for one bird prey.

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.

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.

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

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

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.

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.

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

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

A feature on Zion National Park, a kingdom of towering rocks, deep canyons, and sandstone walls.

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

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

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.

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.

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 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.

Hope prepares for one of the most important days of the year; a violent storm threatens the event.

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 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.

Introducing a cast of charismatic animals to reveal the remarkable strategies they use to survive, and even thrive, in winter -- for animals this is the toughest time of year, and preparations start early.

Baby animals approach the end of their first year of life, branching away from their mothers and exploring the world on their own.

An Antarctic gentoo penguin pops the question with a rocky token of his devotion; how a Madagascar lemur uses toxic millipedes for pest control; makeup techniques with a flamingo; a honey badger that can pick locks.

From Africa to Sri Lanka to Iceland, animal babies learn the most basic tools for survival during the first three months of life.

Mountains are some of the most challenging places for animals to live. Mountain babies must battle extreme weather and hungry predators. With food difficult to find, they have to work hard for every mouthful.

Gordon Buchanan meets the animals that live in nature's winter wonderlands. He reveals their survival secrets, from the polar bear mother that gives her cubs the best possible start in life to the owl that finds food hidden beneath a blanket of snow.

Winter slowly releases its iron grip on the North Atlantic; meet a family of playful otters, a lovelorn Arctic fox, and a reindeer herd determined to reach their calving grounds despite the fearsome weather.

Experience the North Atlantic's intense, brief summer with its animal residents; follow Arctic fox cubs learning to hunt for survival, an otter pup going solo for the first time, a mate-seeking puffin, and tiny reindeer taking their first steps.

Welcoming autumn to the North Atlantic, when its animals struggle to prepare for winter; tracing the grey seals' mating frenzy and witnessing the horrific price one seal pup must pay; reindeer undertake a perilous swim along their migration path.

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.

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

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.

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.

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

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.

Footage of the remote desert of Arizona, including the state's canyons, towering cliffs and fossilized dunes.

Steering clear of alphas, whose horns, claws and other protective gear keep them ready for battle, no matter what the weather dishes out; examining killer Highland cow horns, plucky mallard bills, razor-edged wolverine claws, and more.

A male brown hare throws punches at his beloved; admiring a sandhill crane dance battle; ibexes butt heads (literally) during mating season; why leopards are stealth masters.

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 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.

A look at how Madagascar's species have evolved to exploit their various habitats.

A look at the cold-blooded residents of Madagascar.

Dr. Barry gets married; an eagle needs surgery; Hope releases the deer that arrived as fawns.

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

Meeting alphas who get by with a little help from their friends; the inescapable gang mentality of mating male dolphins; ant colonies' unique scents; female geladas always get the last word; wolves hunt family-style.

Celebrating small but mighty animal warriors armed with sheaves of scary weapons; admiring nutrias' stink bombs; honey badgers' needlelike choppers; black-tailed gulls' razor-sharp beaks; the killer talons on dive-bombing peregrine falcons.

Filmed in the largest contiguous wetland in the world, this area of the Pantanal contains numerous jaguars who hunt caiman and capybara and are up to twice the weight of jaguars elsewhere.

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.

Rejoining the team for some post-rainy-season drama as they search for Ferinha, Fera and Badalo, whose tracking collars are missing; meeting a new biologist, who helps Lizzie recollar the jaguars.

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

The Onçafari team gets to know Aroeira, their newly collared female and takes a peek at Aurora's cub, Apolo; Badalo moves deeper into the flooded forest, where he puts Lizzie's game-changing research in jeopardy.

A pride of lions roams the Luangwa Valley and encounters honey badgers, warthogs, hyenas and other fascinating animals.

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.

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.

Rejoining the team for some post-rainy-season drama as they search for Ferinha, Fera and Badalo, whose tracking collars are missing; meeting a new biologist, who helps Lizzie recollar the jaguars.

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

The Onçafari team gets to know Aroeira, their newly collared female and takes a peek at Aurora's cub, Apolo; Badalo moves deeper into the flooded forest, where he puts Lizzie's game-changing research in jeopardy.

A pride of lions roams the Luangwa Valley and encounters honey badgers, warthogs, hyenas and other fascinating animals.

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.

The Bahamas are home to migratory birds, green turtles, and rock iguanas.

Elands lock corkscrew horns; storks rattle sabre-shaped beaks; rhinos scare the competition with massive 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.

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

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

Eoin is back in his Galway Hooker and sailing to the islands off County Kerry before heading south into his home waters off Cork and the end of his journey at Fastnet Rock.

Exploreing the captivating cityscape, where Matnoor rules over the 30-member-strong Street Troop, before meeting the wilder Hill Troop's old alpha, Aarav.

Hope is taking on more animals and more responsibilities, but there are concerns about Hope's own health.

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

The 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.

Big cat expert Giles Clark adopts jaguar cub Maya and hand-raises her at home while raising funds for wild cats; Giles has his hands full, improving the lives of the fifty cats that live there.

Maya grows up to be seven weeks old and is becoming determined and vocal; Giles feels overwhelmed about the enormity of what he has taken on with the sanctuary, but is paying close attention to Maya's health, in particular her eyesight.

Maya is ten weeks old and is starting to push the family to their limits; she wreaks havoc in the house, destroying the bookshelf, getting into the fridge and ripping up the sofa; she is also showing possessive behaviors with her toys.

An aging leopard in Zambia is challenged by a younger female.

Lions along the Luangwe River raise their cubs.

A Lion cub runt must survive alone.

Adolescent lions face many challenges.

Big cat expert Giles Clark adopts jaguar cub Maya and hand-raises her at home while raising funds for wild cats; Giles has his hands full, improving the lives of the fifty cats that live there.

Maya grows up to be seven weeks old and is becoming determined and vocal; Giles feels overwhelmed about the enormity of what he has taken on with the sanctuary, but is paying close attention to Maya's health, in particular her eyesight.

Maya is ten weeks old and is starting to push the family to their limits; she wreaks havoc in the house, destroying the bookshelf, getting into the fridge and ripping up the sofa; she is also showing possessive behaviors with her toys.

An aging leopard in Zambia is challenged by a younger female.

Lions along the Luangwe River raise their cubs.

A Lion cub runt must survive alone.

Adolescent lions face many challenges.

Lake Superior has the longest undeveloped shoreline of Canada's Great lakes.

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

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

The Hill Troop invades the Street Troop's turf before the Sisterhood plots to kidnap Sara's baby, and the alpha Loci discovers that his old rival has made a return.

A brawl erupts after the Street Troop finds the Hill Troop on their turf before the alpha wannabe Ajit makes his move.

An Antarctic gentoo penguin pops the question with a rocky token of his devotion; how a Madagascar lemur uses toxic millipedes for pest control; makeup techniques with a flamingo; a honey badger that can pick locks.

Hermit crabs have an orderly shell exchange on a Belize beach; meeting a Senegalese chimp's pet genet; an otter who swaps hostages for free meals; the agricultural prowess of leafcutter ants in the rainforest.

An old patient gets a second chance; a pregnant porcupine; Hope has surgery.

Cabo Pulmo is the site of an extraordinary marine recovery.

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.

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.

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.

When the all-female Hollywood pride encounters the Nomads, a new pride of rival males, they might have found the answer to their mating dry spell.

An attack leaves matriarch Ava incapacitated; Sam finds a tiny hyena cub all alone; the hyenas and the MK pride battle over a buffalo; Nathan discovers the MKs are hiding more cubs.

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

Lions and hyenas learn hunting tactics through trials designed to explore recognition.

Lions and hyenas take part in a set of challenges that test their intelligence, teamwork and their killer instincts.

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.

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.

When the all-female Hollywood pride encounters the Nomads, a new pride of rival males, they might have found the answer to their mating dry spell.

An attack leaves matriarch Ava incapacitated; Sam finds a tiny hyena cub all alone; the hyenas and the MK pride battle over a buffalo; Nathan discovers the MKs are hiding more cubs.

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

Lions and hyenas learn hunting tactics through trials designed to explore recognition.

Lions and hyenas take part in a set of challenges that test their intelligence, teamwork and their killer instincts.

The Niagara Escarpment Biosphere Reserve begins with the mighty Niagara Falls and winds its way through deep valleys and caves.

The Grasslands National Park protects the North American mixed grass prairie.

Despite being the second smallest park in Canada, Point Pelee bird watching reputation is huge.

Tenacious meerkat pups are determined to devour deadly scorpions in the vast Kalahari Desert; a group of lionesses demonstrate their seduction tactics in Kenya.

Frigate birds steal meals from smaller seabirds; a mongoose-run spa with a grateful warthog; decoding an African elephant's secret message; lovelorn capuchin monkeys hurl rocks to attract prospective mates.

Sizing up a primate no bigger than a mouse, a chameleon that fits on a fingertip and other minuscule creatures with biologist Patrick Aryee; learning why being tiny can be an advantage; some ingenious adaptations to life's big challenges.

Find good magic, and visit the dark side of the world's tropical forests.

Hope visits two long-term patients; tough choices; a unique creature joins the rehab.

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

The civilization of the first and finest national park in Canada, is surrounded by untamed wildlife.

The Bruce Peninsula is the largest natural landscape remaining in Southern Ontario.

The story of five male cubs growing up on the Skeleton Coast of Namibia; the lions cover vast distances, thriving as nomadic hunters and becoming the youngest pride males ever to rule Namib's ancient desert realm; one brother sets off alone.

Following two cheetah mothers -- Savannah and her four cubs, in the Tswalu Kalahari Reserve, and Chili and her five kittens in the Great Karoo Wilderness -- as they navigate a harsh environment, dangerous wildlife and dwindling prey.

Wildlife filmmaker Gordon Buchanan gets close to wild cheetah in the Kalahari, experiencing first-hand the very real dangers these big cats face.

In South Africa's Greater Kruger Park, a lion cub finds her place in the wild under the guidance of a devoted father, a fierce mother and a playful sister.

Cheetah cub Usana is born with the odds stacked against her, but she is lucky to have an amazing mother that will stop at nothing to keep her cubs safe.

Test limits with jaguar cub Frida, who's honing her survival skills in Brazil's Caiman Lodge Reserve.

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

Leaving their native home in South Africa, seven lions are being transported to Akagera National Park, covering thousands of miles to the heart of Africa, in order to revive the local lion species.

Following two cheetah mothers -- Savannah and her four cubs, in the Tswalu Kalahari Reserve, and Chili and her five kittens in the Great Karoo Wilderness -- as they navigate a harsh environment, dangerous wildlife and dwindling prey.

Wildlife filmmaker Gordon Buchanan gets close to wild cheetah in the Kalahari, experiencing first-hand the very real dangers these big cats face.

In South Africa's Greater Kruger Park, a lion cub finds her place in the wild under the guidance of a devoted father, a fierce mother and a playful sister.

Cheetah cub Usana is born with the odds stacked against her, but she is lucky to have an amazing mother that will stop at nothing to keep her cubs safe.

Test limits with jaguar cub Frida, who's honing her survival skills in Brazil's Caiman Lodge Reserve.

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

Leaving their native home in South Africa, seven lions are being transported to Akagera National Park, covering thousands of miles to the heart of Africa, in order to revive the local lion species.

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

The Pacific Rim National Park Reserve is one of Canada's most beautiful and powerful parks.

This oldest National Park in the Canadian Maritimes is home to the highest density of moose in the world.

It takes a village to raise lion cubs in Kenya and sniff out the mating strategy of fragrant lemurs in Madagascar; cutting a rug at a honeybee dance party, then listen up as a forked-tailed drongo tricks other birds out of their dinner.

Features the toothy fish that help sharks maintain their pearly whites, the signature calls of dolphin families, and the capuchin monkey's nut-cracking stone tools, snuggling giraffes, and a meerkat mobster.

A polar bear and her cubs make a 400-mile journey from their birth den in Svalbard, Norway, to pack ice surrounding the North Pole.

Introducing a cast of charismatic animals to reveal the remarkable strategies they use to survive, and even thrive, in winter -- for animals this is the toughest time of year, and preparations start early.

The flood of fawns arrives; a pigeon gets some much needed relief; an animal is stuck in a car.

Palau is home to large manta rays, WWII wrecks, and a coral reef.

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

Riding Mountain National Park in Manitoba.

The lions of Tanzania are the only cat species to live in groups; tiny rusty spotted cat of Sri Lankais 200 times smaller than a lion but just as curious.

After the dry season lowers the waters, siblings Kimba and Maya risk crossing the river to search for their parents; they run the gauntlet of the densest populations of crocs and hippos in Africa.

During the last few weeks of the dry season, the prides stick close to the only available water in the river; in Luangwa, the scent of a hippo kill compels the Hollywoods to cross the river.

The dry season is approaching its end, and the MK pride faces its toughest moment yet; their matriarch and best hunter, Surabi, is gored by a buffalo and her survival hangs in the balance; one of the youngest members of the pride is lost and alone.

Big cat expert Giles Clark adopts jaguar cub Maya and hand-raises her at home while raising funds for wild cats; Giles has his hands full, improving the lives of the fifty cats that live there.

Maya grows up to be seven weeks old and is becoming determined and vocal; Giles feels overwhelmed about the enormity of what he has taken on with the sanctuary, but is paying close attention to Maya's health, in particular her eyesight.

Maya is ten weeks old and is starting to push the family to their limits; she wreaks havoc in the house, destroying the bookshelf, getting into the fridge and ripping up the sofa; she is also showing possessive behaviors with her toys.