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

Battling for dominion over the river with crocs; catching glimpses of an ultra-rare mangrove snake and an endangered nabarlek wallaby; humpback whale mothers raise their calves in the ocean; false killer whales.

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

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

Jean meets the inhabitants of the Serengeti.

Exploring the only island park in the Canadian Maritimes.

Canada's largest national park.

Hope and Dr. Barry break ground on new chapters in their life, Hope rebuilding the rehab and Dr. Barry setting out on his own.

Jean meets the inhabitants of the Serengeti.

Exploring the only island park in the Canadian Maritimes.

Canada's largest national park.

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

Jean meets the inhabitants of the Serengeti.

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.

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.

Battling for dominion over the river with crocs; catching glimpses of an ultra-rare mangrove snake and an endangered nabarlek wallaby; humpback whale mothers raise their calves in the ocean; false killer whales.

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

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

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

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.

RSPCA vets treat a mother and baby koala, while rescuers capture a barn owl.

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

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.

RSPCA vets treat a mother and baby koala, while rescuers capture a barn owl.

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

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

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.

RSPCA vets treat a mother and baby koala, while rescuers capture a barn owl.

The team saves a massive sea lion caught in a plastic noose; a visit to the Rescue Centre where a harbor seal pup may lose its eyesight; a baby sea otter needs a risky but life-saving surgery.

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

Mingan Archipelago, along the St. Lawrence River, is composed of 30 limestone islands and more than 1,0000 islets.

Hope's open house is bigger than ever; a mysterious visitor leaves a big impression.

The team saves a massive sea lion caught in a plastic noose; a visit to the Rescue Centre where a harbor seal pup may lose its eyesight; a baby sea otter needs a risky but life-saving surgery.

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

Mingan Archipelago, along the St. Lawrence River, is composed of 30 limestone islands and more than 1,0000 islets.

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

The team saves a massive sea lion caught in a plastic noose; a visit to the Rescue Centre where a harbor seal pup may lose its eyesight; a baby sea otter needs a risky but life-saving surgery.

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

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

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

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

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

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.

RSPCA vets treat a mother and baby koala, while rescuers capture a barn owl.

The ultimate battle for dominance as scientists try to pick out the alpha male in a pack of 100-plus great white sharks off the New Zealand coast.

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

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

The ultimate battle for dominance as scientists try to pick out the alpha male in a pack of 100-plus great white sharks off the New Zealand coast.

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

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

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

The ultimate battle for dominance as scientists try to pick out the alpha male in a pack of 100-plus great white sharks off the New Zealand coast.

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

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

Battling wind and waves to find a sea lion trapped in a plastic ring; visiting a rescue centre, where over 80 orphan seals must be fed several times a day to prepare for release into the wild; an Amazonian duck gets a miraculous operation.

Killarney Provincial Park acted as a battleground early in the environmental movement.

Nanabijou's trails may affect dear, wolf, and moose populations.

Endangered bats need Hope's help, but it means taking unusual steps; Hope's deer release has a bumpy start.

Battling wind and waves to find a sea lion trapped in a plastic ring; visiting a rescue centre, where over 80 orphan seals must be fed several times a day to prepare for release into the wild; an Amazonian duck gets a miraculous operation.

Killarney Provincial Park acted as a battleground early in the environmental movement.

Nanabijou's trails may affect dear, wolf, and moose populations.

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.

Battling wind and waves to find a sea lion trapped in a plastic ring; visiting a rescue centre, where over 80 orphan seals must be fed several times a day to prepare for release into the wild; an Amazonian duck gets a miraculous operation.

Penguin populations of Australia.

A look into the lives of emus.

A look at various airborne hunters.

An in-depth look at the elaborate and flamboyant mating rituals of various birds, including the prehistoric-looking cassowary and the male Victoria's riflebird.

The ultimate battle for dominance as scientists try to pick out the alpha male in a pack of 100-plus great white sharks off the New Zealand coast.

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

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

The water bodies in Serengeti serve as a lifeline to many terrestrial, aerial and amphibious animals. Without them, the park's ecosystem cannot be considered whole.

Frozen water takes on a sharper persona, influencing everything in its path.

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 water bodies in Serengeti serve as a lifeline to many terrestrial, aerial and amphibious animals. Without them, the park's ecosystem cannot be considered whole.

Frozen water takes on a sharper persona, influencing everything in its path.

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.

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.

The water bodies in Serengeti serve as a lifeline to many terrestrial, aerial and amphibious animals. Without them, the park's ecosystem cannot be considered whole.

Frozen water takes on a sharper persona, influencing everything in its path.

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.

Follow the team in healing and releasing a grumpy sea turtle and then meet a sea lion with an unusual injury that must be taken by crane to the rescue center; find out how the vet aids an aging fruit bat and a community rescues a one-eyed seal pup.

Quetico Provincial Park pioneers forest fire strategies and faces a declining moose population.

The jewel of the Ontario parks system gives a muse to Tom Thompson and draws many researchers.

The worst winter in 100 years causes big problems.

Follow the team in healing and releasing a grumpy sea turtle and then meet a sea lion with an unusual injury that must be taken by crane to the rescue center; find out how the vet aids an aging fruit bat and a community rescues a one-eyed seal pup.

Quetico Provincial Park pioneers forest fire strategies and faces a declining moose population.

The jewel of the Ontario parks system gives a muse to Tom Thompson and draws many researchers.

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.

Follow the team in healing and releasing a grumpy sea turtle and then meet a sea lion with an unusual injury that must be taken by crane to the rescue center; find out how the vet aids an aging fruit bat and a community rescues a one-eyed seal pup.

Join anthropologist Jill Pruetz and guide Dondo "Johnny" Kanté and watch evolution happen in real time; meet the elusive chimps of Fongoli, Senegal, who use tools, interact with fire, and adapt to the human world as it collides with their own.

Elephants living in Tanzania.

Observe the fragile and evolving friendship between humans and elephants.

Two elephants journey from bondage and servitude to their new lives in Elephant Haven's forest, where they are able to begin their recovery and rehabilitation in the wild.

The water bodies in Serengeti serve as a lifeline to many terrestrial, aerial and amphibious animals. Without them, the park's ecosystem cannot be considered whole.

Frozen water takes on a sharper persona, influencing everything in its path.

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.

A look at the lives of elephant bulls in Mount Kilimanjaro and Amboseli, including their drive for dominance and the social bonds that form between males.

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

Contemplate shark community hierarchies and discover how they socialize.

A look at the lives of elephant bulls in Mount Kilimanjaro and Amboseli, including their drive for dominance and the social bonds that form between males.

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

Contemplate shark community hierarchies and discover how they socialize.

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 look at the lives of elephant bulls in Mount Kilimanjaro and Amboseli, including their drive for dominance and the social bonds that form between males.

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

Contemplate shark community hierarchies and discover how they socialize.

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.

Determining the effect of global warming on the park's glaciers and wolverine population.

A healthy bison population is threatened by where they eat.

A hare needs help; Chelsea rescues a litter of orphaned foxes; Dr. Barry helps an injured bobcat.

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.

Determining the effect of global warming on the park's glaciers and wolverine population.

A healthy bison population is threatened by where they eat.

"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.

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.

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

Human influence and effect on the beaches of California.

Descend into the tide pool, where a hermit crab house hunts; a baby catshark runs into strange neighbors; an octopus terrorizes prey; watch seagulls and other creatures hunt on the surface as the heat rises and oxygen depletes in the pool.

The sun sets and predators prowl around the pool before the tide finally rolls in; persevere as night falls with a kleptomaniacal slug and an acrobatic scallop; a pair of sneaky crabs take a dangerous shot at romance.

A look at the lives of elephant bulls in Mount Kilimanjaro and Amboseli, including their drive for dominance and the social bonds that form between males.

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

Contemplate shark community hierarchies and discover how they socialize.

Piglets growing up in the Brecon Beacons are followed for their first 12 weeks, and the theory that every piglet always returns to the same teat to suckle is tested.

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.

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

Piglets growing up in the Brecon Beacons are followed for their first 12 weeks, and the theory that every piglet always returns to the same teat to suckle is tested.

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.

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

"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.

Piglets growing up in the Brecon Beacons are followed for their first 12 weeks, and the theory that every piglet always returns to the same teat to suckle is tested.

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.

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

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.

Feeding a Giant Panda cub named Bao Bao.

Feeding a pride of adolescent lions.

Hope's team build a special flight tent for a lone bat; a young porcupine arrives at the rehab; a stranded seal is rescued.

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.

Feeding a Giant Panda cub named Bao Bao.

Feeding a pride of adolescent lions.

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

The 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.

A family of wild dogs living in a corner of Zambia's Luangwa Valley.

Spotty the hyena must ascend to the leadership of the Chimbwe Clan in Zambia's Luangwa Valley.

Explore community-run Reteti Elephant Sanctuary, where human surrogate moms offer survival lessons and nurture young elephants through play; bonding with trunkless Long'uro and seeing why Kelele's mysterious illness could delay his release.

Balance the pain of goodbyes with hope for the future as a generation of rescued elephants is finally released.

Piglets growing up in the Brecon Beacons are followed for their first 12 weeks, and the theory that every piglet always returns to the same teat to suckle is tested.

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.

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

Five desert lions come of age in the African Namib.

Soothing a bitten koala and itchy possums.

Tackling pet hoarding and a deadly snake.

Five desert lions come of age in the African Namib.

Soothing a bitten koala and itchy possums.

Tackling pet hoarding and a deadly snake.

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.

Five desert lions come of age in the African Namib.

Soothing a bitten koala and itchy possums.

Tackling pet hoarding and a deadly snake.

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.

Behind the scenes of North America's largest zoo kitchen.

The National Zoo feeds its animals by growing their own food.

A seal contracts a mysterious illness.

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.

Behind the scenes of North America's largest zoo kitchen.

The National Zoo feeds its animals by growing their own food.

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.

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.

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

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.

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

The people of Nunavik prepare for the coming winter.

Five desert lions come of age in the African Namib.

Soothing a bitten koala and itchy possums.

Tackling pet hoarding and a deadly snake.

Exploring ancient fire traditions and a sugar glider's daring escape from the flames.

Some of the most amazing hippo behavior happens after dark.

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

Exploring ancient fire traditions and a sugar glider's daring escape from the flames.

Some of the most amazing hippo behavior happens after dark.

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

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.

Exploring ancient fire traditions and a sugar glider's daring escape from the flames.

Some of the most amazing hippo behavior happens after dark.

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

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

Food acts as an important way for animals to keep busy, happy and healthy.

A herd of elephants from the Calgary Zoo arrive at the National Zoo in Washington D.C.

Many fawns are in need of help.

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

Food acts as an important way for animals to keep busy, happy and healthy.

A herd of elephants from the Calgary Zoo arrive at the National Zoo in Washington D.C.

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.

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

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.

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

Exploring ancient fire traditions and a sugar glider's daring escape from the flames.

Some of the most amazing hippo behavior happens after dark.

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

Steve Leonard and his team of vets investigate the best way to help your pet lose weight; witness an operation to improve the life of a paralysed dachshund; they decode the secret language of guinea pigs.

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.

Senior vet Tim tutors new recruit Phil through an injured koala checkup; the team's solutions for animals plagued by the summer heat; vet Karina solves a puzzling frog case and releases an old friend who's ready to fly.

Steve Leonard and his team of vets investigate the best way to help your pet lose weight; witness an operation to improve the life of a paralysed dachshund; they decode the secret language of guinea pigs.

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.

Senior vet Tim tutors new recruit Phil through an injured koala checkup; the team's solutions for animals plagued by the summer heat; vet Karina solves a puzzling frog case and releases an old friend who's ready to fly.

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.

Steve Leonard and his team of vets investigate the best way to help your pet lose weight; witness an operation to improve the life of a paralysed dachshund; they decode the secret language of guinea pigs.

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.

Senior vet Tim tutors new recruit Phil through an injured koala checkup; the team's solutions for animals plagued by the summer heat; vet Karina solves a puzzling frog case and releases an old friend who's ready to fly.

Celebrate as a newly arrived trio of sisters teaches Winston about friendship.

The St. Louis Zoo caters to a wide range of tastes for some of the world's largest eaters, including an anaconda and hippos.

The keepers at the St. Louis Zoo make sure that every animal family gets the proper nutrition.

Bobcats are returned to the wild.

Celebrate as a newly arrived trio of sisters teaches Winston about friendship.

The St. Louis Zoo caters to a wide range of tastes for some of the world's largest eaters, including an anaconda and hippos.

The keepers at the St. Louis Zoo make sure that every animal family gets the proper nutrition.

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.

Celebrate as a newly arrived trio of sisters teaches Winston about friendship.

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.

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.

Steve Leonard and his team of vets investigate the best way to help your pet lose weight; witness an operation to improve the life of a paralysed dachshund; they decode the secret language of guinea pigs.

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.

Senior vet Tim tutors new recruit Phil through an injured koala checkup; the team's solutions for animals plagued by the summer heat; vet Karina solves a puzzling frog case and releases an old friend who's ready to fly.

Experts examine whether female or male sharks are more dominant, testing jumping, boldness and strength in a series of challenges.

Enduring winter and early spring on the West Coast, where animals eke out a chilly existence; watching red deer battle on windswept Inishvickillane, welcome seal pups amid howling storms on the Inishkea Islands.

Exploring a 1,500-year-old monastery among the dizzying crags of the world-famous Skellig Islands; Spy Manx shearwaters and humpback whales, pygmy shrews on Clare, and the Aran Islands at an autumn spectacle.

Experts examine whether female or male sharks are more dominant, testing jumping, boldness and strength in a series of challenges.

Enduring winter and early spring on the West Coast, where animals eke out a chilly existence; watching red deer battle on windswept Inishvickillane, welcome seal pups amid howling storms on the Inishkea Islands.

Exploring a 1,500-year-old monastery among the dizzying crags of the world-famous Skellig Islands; Spy Manx shearwaters and humpback whales, pygmy shrews on Clare, and the Aran Islands at an autumn spectacle.

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.

Experts examine whether female or male sharks are more dominant, testing jumping, boldness and strength in a series of challenges.

Enduring winter and early spring on the West Coast, where animals eke out a chilly existence; watching red deer battle on windswept Inishvickillane, welcome seal pups amid howling storms on the Inishkea Islands.

Exploring a 1,500-year-old monastery among the dizzying crags of the world-famous Skellig Islands; Spy Manx shearwaters and humpback whales, pygmy shrews on Clare, and the Aran Islands at an autumn spectacle.

Bone up on outdoor skills as Winston and the X girls move into their new fresh-air enclosure; witness Yasmine and Yara's kindergarten power struggle.

The staff at the St. Louis Zoo deals with managing the nutritional needs of picky eaters.

Zookeepers feed the minds of their hungry animals. Whether it's puzzles and piñatas, or honey tubes and herb gardens, food is the icing on the cake to prevent boredom.

Hope tries to save an injured fawn.

Bone up on outdoor skills as Winston and the X girls move into their new fresh-air enclosure; witness Yasmine and Yara's kindergarten power struggle.

The staff at the St. Louis Zoo deals with managing the nutritional needs of picky eaters.

Zookeepers feed the minds of their hungry animals. Whether it's puzzles and piñatas, or honey tubes and herb gardens, food is the icing on the cake to prevent boredom.

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.

Bone up on outdoor skills as Winston and the X girls move into their new fresh-air enclosure; witness Yasmine and Yara's kindergarten power struggle.

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

The course of South Africa's Orange River.

Lions, hyenas and buffalo work together to survive in the Zambian wilderness.

More than 480 different species of birds spread their wings in the Luangwa Valley over the course of a year.

Experts examine whether female or male sharks are more dominant, testing jumping, boldness and strength in a series of challenges.