Blow It Up. Ben is in shock when he crashes into a large bird mid-flight in Unk. Plus, can Doug complete a risky mission to deliver volatile explosives to the island of St Lawrence?
01:35 Flying Wild Alaska 1/7s.
Deep Freeze. Era Alaska has a special canine delivery for four-time Iditarod champion Lance Mackey. Plus, how will Jim and Ferno cope on the airline's busiest day of the year?
02:25 Flying Wild Alaska 1/8s.
Bush Brawl. Era pilots are forced to circle the airport when a violent snowstorm shuts down Western Alaska. Plus, Ariel finds out just how badly a flying lesson can go.
03:15 Flying Wild Alaska 1/9s.
Trick or Tweto. Halloween in Alaska brings vicious winds that cause havoc for the small planes. Plus, can station manager Ariel look on the bright side of a blackout?
04:02 Animal Cops Houston 19/5s.
Human Trafficking Operation. A cruelty investigator is responding to a call from the sheriff's department. A pony has been dragged down a road, leaving it crippled with pain.
04:49 Animal Cops Houston 19/6s.
Episode 6. Animal control officers have been removing cats from an apartment where a woman has recently been evicted. Some of the animals are in bad shape and need help urgently.
05:36 Animal Battlegrounds 1/3s.
Seas. Deep in the ocean, dolphins pick off sardines, jacks relentlessly hunt their prey, sharks are cruising, and humpback whales are hungry.
06:00 Animal Battlegrounds 1/4s.
Air. The peregrine falcon, which can spot its prey from 10km, is hunting in the English countryside, while bats try to evade snakes and flesh-eating beetles lurking in their cave.
06:25 Animal Cops Houston 9/8s.
Sanctuary Seizure. Two hundred birds and mammals are evacuated from a sanctuary which is neglecting animals. It's a big job, but the team is on hand to help every step of the way.
07:15 Animal Cops Houston 9/9s.
Catahoula Puppies. Investigators are called in when a raid on a drug smuggling operation uncovers fighting roosters and Dana Moss rescues two dogs about to give birth.
08:10 Animal Cops Houston 9/10s.
Ferret Frenzy. HSPCA worker Dana Moss is called to help a colt that is unable to stand, while Senior Investigator Kirstie rescues ferrets abandoned in a freezing house.
09:05 Animal Cops Houston 9/11s.
Six Mangy Mutts. Puppies dumped in a ditch need the teams love and attention. Finding these poor pups secure homes should be easy, but health problems put everything in jeopardy.
10:00 Animal Cops Houston 9/12s.
Fighting Birds. Police raid a rooster fight in full swing and the team swoop. A couple who have been fostering unwanted animals are overwhelmed - It's time for Dana Moss help.
10:55 Animal Cops Houston 9/13s.
Little Colt that Could. Three horses are being neglected. They have become so desperately hungry, even sand is food. When one collapses, the team pulls out all the stops.
11:50 Cats 101 4/1s.
Episode 1. Meet the cat that consoles the bereaved at a pet funeral home and the feline that resembles a Star Wars movie icon. Plus, find out why some cats have the desire to become burglars.
12:45 Dr. Dee: Alaska Vet 2/3s.
Against All Odds. Dr. Dee and Ken host a vet clinic, Dr. Terry performs emergency surgery on a dog that suffered an attack, and a mystery surrounding a lovesick turtle is solved.
13:40 Dr. Jeff: Rocky Mountain Vet 5/6s.
A Tiger's Tale. The team cares for abandoned kittens. Plus, Dr. Jeff gives hope to a concerned owner when their beloved dog is diagnosed with cancer and a rescue tiger finds love.
14:35 Intruders 1/3s.
They Came from Below. In Detroit, a filthy neighbour turns a dream apartment into a nightmare. In California, a mother battles to protect her special needs son from venomous snakes.
15:30 Flying Wild Alaska 1/10s.
Goodbye Sun. As winter closes in the annual exodus from Unalakleet begins. In Barrow, a bootlegger attempts to smuggle in illegal liquor and Luke races to complete a daring rescue.
16:25 Animal Cops Houston 19/8s.
Episode 8. Animal Cruelty Investigators from the Houston SPCA discover an elderly family overrun with cats all living under one roof dangerously close to collapse.
17:20 Cats 101 4/2s.
Episode 2. Meet the feline co-host of a popular talk radio show and discover which native island cat may have been the first to be domesticated by man. Plus, do cats really have nine lives?
18:15 Great White Shark: Uncaged
In the world's most shark-infested waters, an extreme team of divers attempts to photograph massive great white sharks without the protection of a cage.
19:10 Nature's Strangest Mysteries: Solved 1/9s.
Octopus Houdini. Experts analyse and explain how a bird can sing without using its voice. Plus, how can an octopus escape and then disappear from its aquarium?
19:38 How Do Animals Do That 1/9s.
Episode 9. Experts reveal how swarms of blind bats avoid collision. Do mice really like cheese? What makes manatees' farts so special? And, why are slugs so slimy?
20:05 Wildest Indochina 1/4s.
Malaysia. The diversity of Malaysia is unparalleled, especially on the third largest island in the world, Borneo, where orangutans swing in the canopy and giant saltwater crocs lurk.
21:00 Intruders 1/4s.
Vicious and Venomous. A family in Arkansas move into a house already home to a deadly infestation of spiders. In Florida, a dream home is surrounded by venomous snakes.
21:55 Pit Bulls & Parolees 5/2s.
Shell Shocked. Tania oversees the rescue of ten dogs left to die in deplorable conditions. Tia helps a family find the perfect companion for their special needs teenager.
22:50 Great White Shark: Uncaged
In the world's most shark-infested waters, an extreme team of divers attempts to photograph massive great white sharks without the protection of a cage.
23:45 Nature's Strangest Mysteries: Solved 1/9s.
Octopus Houdini. Experts analyse and explain how a bird can sing without using its voice. Plus, how can an octopus escape and then disappear from its aquarium?
Episode 9. Experts reveal how swarms of blind bats avoid collision. Do mice really like cheese? What makes manatees' farts so special? And, why are slugs so slimy?
00:40 Intruders 1/4s.
Vicious and Venomous. A family in Arkansas move into a house already home to a deadly infestation of spiders. In Florida, a dream home is surrounded by venomous snakes.
01:35 Cats 101 4/2s.
Episode 2. Meet the feline co-host of a popular talk radio show and discover which native island cat may have been the first to be domesticated by man. Plus, do cats really have nine lives?
02:25 Great White Shark: Uncaged
In the world's most shark-infested waters, an extreme team of divers attempts to photograph massive great white sharks without the protection of a cage.
03:15 Nature's Strangest Mysteries: Solved 1/9s.
Octopus Houdini. Experts analyse and explain how a bird can sing without using its voice. Plus, how can an octopus escape and then disappear from its aquarium?
03:39 How Do Animals Do That 1/9s.
Episode 9. Experts reveal how swarms of blind bats avoid collision. Do mice really like cheese? What makes manatees' farts so special? And, why are slugs so slimy?
04:02 Wildest Indochina 1/4s.
Malaysia. The diversity of Malaysia is unparalleled, especially on the third largest island in the world, Borneo, where orangutans swing in the canopy and giant saltwater crocs lurk.
04:49 Pit Bulls & Parolees 5/2s.
Shell Shocked. Tania oversees the rescue of ten dogs left to die in deplorable conditions. Tia helps a family find the perfect companion for their special needs teenager.
05:36 Animal Battlegrounds 1/4s.
Air. The peregrine falcon, which can spot its prey from 10km, is hunting in the English countryside, while bats try to evade snakes and flesh-eating beetles lurking in their cave.
06:00 Animal Battlegrounds 1/5s.
Wetlands. The battleground is the soda lakes of the Rift Valley, where flamingos take on baboons and hyenas in the toxic soup of chemicals that they call home.
06:25 Pit Bulls & Parolees 7/5s.
Blindsided. After a dog is shot, Tia races to save his life. Then, Matt and Lizzy scramble to rescue a scared and sick puppy running loose on the busy roads near the warehouse.
07:15 Pit Bulls & Parolees 7/6s.
Shock to the System. When Tania and Matt try to rescue a dog, Matt gets the scare of a lifetime. Plus, a new recruit learns the heartbreak that comes with a life in dog rescue.
08:10 Pit Bulls & Parolees 7/7s.
New Frontiers. A new season brings new challenges as Villalobos Rescue Center expands beyond New Orleans opening a satellite shelter in nearby Assumption Parish.
09:05 Pit Bulls & Parolees 7/8s.
First Time For Everything. Tia faces a challenge rescuing a dog tied up in an empty house, and Tania tries re-homing an unusual resident, but will a health scare risk the adoption?
10:00 Pit Bulls & Parolees 7/9s.
Low Rider. A dog's chance to a home is put at risk when a tumour is found. Meanwhile, Tia faces a tough decision when an aggressive dog becomes a danger to her staff.
10:55 Pit Bulls & Parolees 7/10s.
A New Best Friend. Tia attempts to rescue a scared pit bull after he is abandoned by his owners in an empty house. Later, her personal dog, Jethro, falls dangerously ill.
11:50 Cats 101 4/2s.
Episode 2. Meet the feline co-host of a popular talk radio show and discover which native island cat may have been the first to be domesticated by man. Plus, do cats really have nine lives?
12:45 Dr. Dee: Alaska Vet 2/4s.
Critical Condition. Dee sees a Chihuahua with a life-threatening condition, a Macaw needing a beak trim and a gravely ill calf. Dee and Ken bring some fainting goats into the family.
13:40 The Aquarium 1/5s.
Toddler Sea Lion Scarlett. A sea otter is rushed to the health centre. Plus, the team are in Key Largo to help the coral restoration project and Scarlett the sea lion is trained.
14:35 Intruders 1/4s.
Vicious and Venomous. A family in Arkansas move into a house already home to a deadly infestation of spiders. In Florida, a dream home is surrounded by venomous snakes.
15:30 Everest: Beyond the Limit 2/1s.
Dream Chasers. Experience one of the most dangerous expeditions on Earth as we chronicle the journey of a group of everyday people and their attempt to conquer the world's highest mountain.
16:25 Animal Cops Houston 19/9s.
Episode 9. In a special edition of Animal Cops Houston Investigators look back at the most shocking cases of the series, reliving stories of despair, neglect, rescue and hope.
17:20 Cats 101 4/3s.
Episode 3. Meet the cat with a sixth 'finger' on each paw, find out which feline originates from a 51-degree desert and discover which breed was Julius Caesar's favourite.
18:15 Dodo Heroes 2/3s.
Twist Of Fate Farm. After rescuing abused and neglected horses, Ashley DiFelice started Twist of Fate Farm and Sanctuary. Now, she and her 5-year-old son welcome two dwarf ponies.
19:10 The Zoo: San Diego 1/2s.
Yeti And The Cubs. The Safari Park team release a group of burrowing owls into the wild. Plus, a hamadryas baboon searches for a mate, but the keepers may need to help him.
20:05 Wildest Indochina 1/5s.
Thailand. A country shaped by wild forces, where animals face tough challenges to survive, this is a land where tigers are still the apex predator and monkeys have evolved rapidly.
21:00 Intruders 1/5s.
Cannibal Invasion. In Colorado, a black bear breaks into a cabin while the owner sleeps upstairs. Plus, a young couple in Louisiana is trapped in their trailer by a swarm of bees.
21:55 Pit Bulls & Parolees 5/3s.
We're Gonna Die. Two stray pit bulls hiding beneath a two-ton stack of lumber lure Tia into a dramatic and potentially deadly rescue. Then a colourful Bayou couple visit Villalobos.
22:50 Dodo Heroes 2/3s.
Twist Of Fate Farm. After rescuing abused and neglected horses, Ashley DiFelice started Twist of Fate Farm and Sanctuary. Now, she and her 5-year-old son welcome two dwarf ponies.
23:45 The Zoo: San Diego 1/2s.
Yeti And The Cubs. The Safari Park team release a group of burrowing owls into the wild. Plus, a hamadryas baboon searches for a mate, but the keepers may need to help him.
00:40 Intruders 1/5s.
Cannibal Invasion. In Colorado, a black bear breaks into a cabin while the owner sleeps upstairs. Plus, a young couple in Louisiana is trapped in their trailer by a swarm of bees.
01:35 Cats 101 4/3s.
Episode 3. Meet the cat with a sixth 'finger' on each paw, find out which feline originates from a 51-degree desert and discover which breed was Julius Caesar's favourite.
02:25 Dodo Heroes 2/3s.
Twist Of Fate Farm. After rescuing abused and neglected horses, Ashley DiFelice started Twist of Fate Farm and Sanctuary. Now, she and her 5-year-old son welcome two dwarf ponies.
03:15 The Zoo: San Diego 1/2s.
Yeti And The Cubs. The Safari Park team release a group of burrowing owls into the wild. Plus, a hamadryas baboon searches for a mate, but the keepers may need to help him.
04:02 Wildest Indochina 1/5s.
Thailand. A country shaped by wild forces, where animals face tough challenges to survive, this is a land where tigers are still the apex predator and monkeys have evolved rapidly.
04:49 Pit Bulls & Parolees 5/3s.
We're Gonna Die. Two stray pit bulls hiding beneath a two-ton stack of lumber lure Tia into a dramatic and potentially deadly rescue. Then a colourful Bayou couple visit Villalobos.
05:36 Animal Battlegrounds 1/5s.
Wetlands. The battleground is the soda lakes of the Rift Valley, where flamingos take on baboons and hyenas in the toxic soup of chemicals that they call home.
Grassland. Cheetahs out-chase gazelles, termites seek refuge in their castles, and a pack of wolves triggers a stampede of bison, preparing to prey on the weakest in the herd.
06:25 Biggest and Baddest 1/3s.
Crocs. Niall embarks on a risky night time expedition to track and catch one of the largest reptiles in the world, the legendary Giant Saltwater Crocs of Northern Australia.
07:15 Wildest Islands 1/1s.
Zanzibar. The Zanzibar archipelago is home to giant Aldabra Tortoises, great green turtles, coconut crabs, whale sharks, and massive manta rays. What makes this an ideal habitat?
08:10 Wildest Islands 1/2s.
Caribbean. The Caribbean islands harbour more than 800 species of fish, leatherback turtles, silky coated anteaters, scarlet ibis, and spectacled caiman. Why is this habitat ideal?
09:05 Wildest Islands 1/3s.
Galapagos. How have people, plants and animals developed ingenious ways to survive and thrive in remote locations from the Galapagos Islands to the lush forests of Zanzibar?
10:00 Wildest Islands 1/4s.
Sri Lanka. How have people, plants and animals developed ingenious ways to survive and thrive in remote locations from the Galapagos Islands to the lush forests of Zanzibar?
10:55 Wildest Islands 1/5s.
Hebrides. The islands of the Hebrides are home to puffins, golden eagles, basking sharks, whales, dolphins, otters and corncrakes. What makes this an idyllic habitat?
11:50 Cats 101 4/3s.
Episode 3. Meet the cat with a sixth 'finger' on each paw, find out which feline originates from a 51-degree desert and discover which breed was Julius Caesar's favourite.
12:45 Dr. Dee: Alaska Vet 2/5s.
Down To The Wire. Dr. Dee checks a high-kicking pack horse, and Dr. Terry and Nicole head to Arctic Village for a remote clinic. Dr. Dee treats a dog with a cancerous-looking mass.
13:40 The Zoo: San Diego 1/2s.
Yeti And The Cubs. The Safari Park team release a group of burrowing owls into the wild. Plus, a hamadryas baboon searches for a mate, but the keepers may need to help him.
14:35 Intruders 1/5s.
Cannibal Invasion. In Colorado, a black bear breaks into a cabin while the owner sleeps upstairs. Plus, a young couple in Louisiana is trapped in their trailer by a swarm of bees.
15:30 Everest: Beyond the Limit 2/2s.
On the Ropes. Brice sets the team a strict time limit as they make their first ascent to camp. Meanwhile, Betsy has one last climb to prove herself or face not taking part in the challenge.
16:25 Animal Cops Houston 19/10s.
Episode 10. In a special episode we go behind the closed doors of Hoarder homes and find out how the Houston SPCA is fighting this most shocking act of an animal cruelty.
17:20 Cats 101 4/4s.
Episode 4. Meet the cat that can help those who suffer from cat allergens and the world's rarest breed of feline. Plus, which cat's personality depends on their fur colour.
18:15 Animal Cribs 2/1s.
Dog Town, USA. Antonio helps a family who have opened their garden to all the dogs in the neighbourhood. They add a paddling pool, ramps and tunnels and custom dog houses!
19:10 The Aquarium 1/6s.
Ophelia The Octopus. Trainers get two rescued sea lions ready for eye surgery. Meanwhile, intelligent giant octopus, Ophelia, needs attention and the team head to the Bahamas.
20:05 Mutant Planet 2/1s.
Africa. In the Albertine Rift, immense geological forces have created a huge variety of landscapes and transformed the climate, changing the evolutionary paths of its inhabitants.
21:00 Intruders 1/6s.
Breaking And Entering. A young couple in Boston are kept awake at night by mysterious noises coming from the ceiling. Plus, a family unites to protect their home from grizzly bears.
21:55 Pit Bulls & Parolees 5/4s.
Puppy-Palooza. A rescue mission brings Tia and daughter Mariah face to face with a protective mama dog and her litter of seven puppies, but Villalobos is overrun with puppies.
22:50 Animal Cribs 2/1s.
Dog Town, USA. Antonio helps a family who have opened their garden to all the dogs in the neighbourhood. They add a paddling pool, ramps and tunnels and custom dog houses!
23:45 The Aquarium 1/6s.
Ophelia The Octopus. Trainers get two rescued sea lions ready for eye surgery. Meanwhile, intelligent giant octopus, Ophelia, needs attention and the team head to the Bahamas.
00:40 Intruders 1/6s.
Breaking And Entering. A young couple in Boston are kept awake at night by mysterious noises coming from the ceiling. Plus, a family unites to protect their home from grizzly bears.
01:35 Cats 101 4/4s.
Episode 4. Meet the cat that can help those who suffer from cat allergens and the world's rarest breed of feline. Plus, which cat's personality depends on their fur colour.
02:25 Animal Cribs 2/1s.
Dog Town, USA. Antonio helps a family who have opened their garden to all the dogs in the neighbourhood. They add a paddling pool, ramps and tunnels and custom dog houses!
03:15 The Aquarium 1/6s.
Ophelia The Octopus. Trainers get two rescued sea lions ready for eye surgery. Meanwhile, intelligent giant octopus, Ophelia, needs attention and the team head to the Bahamas.
04:02 Mutant Planet 2/1s.
Africa. In the Albertine Rift, immense geological forces have created a huge variety of landscapes and transformed the climate, changing the evolutionary paths of its inhabitants.
04:49 Pit Bulls & Parolees 5/4s.
Puppy-Palooza. A rescue mission brings Tia and daughter Mariah face to face with a protective mama dog and her litter of seven puppies, but Villalobos is overrun with puppies.
05:36 Animal Battlegrounds 1/6s.
Grassland. Cheetahs out-chase gazelles, termites seek refuge in their castles, and a pack of wolves triggers a stampede of bison, preparing to prey on the weakest in the herd.
Frozen Seas. In Arctic seas, determined polar bears hunt the ringed seal, penguins fall prey to leopard seals and starving Arctic foxes pick off vulnerable seabirds.
06:25 Pit Bulls & Parolees 7/11s.
Unleashed. Tia gives viewers a behind the scenes look at some of her favourite rescues and adoptions from season seven, including some never before seen footage.
07:15 Pit Bulls & Parolees 7/12s.
The One. Tia and her staff scramble to coax a scared dog, hiding under a vehicle, to safety. Plus, Tania's in-laws are seeking a new addition to their home.
08:10 Pit Bulls & Parolees 7/13s.
Behind Bars. Tia enlists Matt's help adopting a patrol dog out to his former home. Then, Tia gets a call about two dogs left behind when their owners abandoned the property.
09:05 Pit Bulls & Parolees 7/14s.
Eye Of The Storm. When a tornado tears through New Orleans, Tania takes charge. Plus, a fellow pit bull trainer seeks Tia's help adopting a dog she can put to work.
10:00 Pit Bulls & Parolees 7/15s.
A Long Time Coming. Tia and the team try nursing a severely malnourished dog back to health and a Hurricane Katrina survivor finally has a chance at a forever home, 10 years on.
10:55 Pit Bulls & Parolees 7/16s.
A Street Dog Named Desire. When a reputed dognapper dumps a dog at Villalobos, Mariah scrambles to find the owner. Plus, a new parolee realises he is in over his head.
11:50 Cats 101 4/4s.
Episode 4. Meet the cat that can help those who suffer from cat allergens and the world's rarest breed of feline. Plus, which cat's personality depends on their fur colour.
12:45 Dr. Dee: Alaska Vet 2/6s.
Farm Frenzy. Dr. Dee flies her mom to a remote vet clinic in Manley Hot Springs, Alaska. At Animal House, a bunny has a tricky abscess, and some St. Bernard puppies visit the clinic!
13:40 Lone Star Law 4/15s.
Bucks And Bow. Boone receives an anonymous tip about a hunter who illegally shot a deer. Plus, McGee questions a man for being in possession of venomous copperhead snakes.
14:35 Intruders 1/6s.
Breaking And Entering. A young couple in Boston are kept awake at night by mysterious noises coming from the ceiling. Plus, a family unites to protect their home from grizzly bears.
15:30 Everest: Beyond the Limit 2/3s.
Judgement Day. The team braves the brutal weather on a climb to the second camp and it's decision time for Brice as he decides who won't be taking part in the ascent.
16:25 Animal Cops Houston 19/11s.
Episode 11. Investigators are called out after disturbing reports of a large number of dogs held captive in make-shift pens. Plus, Octavio Gonzales receives a call about an abandoned horse.
17:20 My Cat From Hell 8/1s.
Scout's Honor. Scout is so afraid of his tormentor, Caramel, he literally lives inside a kitchen cabinet. Allison's adopted Bengal cat, Cheeto, can use the toilet - but attacks her.
18:15 Lone Star Law 4/16s.
Owl Gone Bad. It's the start of deer and oyster season in Texas. Game Wardens Chelsea and Ben come across a young crew with a large number of oysters and an owl is rescued.
19:10 Guardians of Rescue 1/2s.
The Angry King. Rob and vet Moose investigate a claim about dogfighting, while Brian and Face try to help an aggressive dog on a chain. Plus, Dori helps a homeless vet, and his cats.
20:05 Mutant Planet 2/2s.
Borneo. Borneo's 130 million-year-old jungles are home to pygmy forest mammals, weird symbiotic partnerships between plants and animals, and the world's rarest ape.
21:00 Finding Bigfoot 1/3s.
Bigfoot Crossing in Georgia. The team is investigating a Bigfoot sighting in north Georgia when they make a shocking discovery. Are they finally closing in on this legendary beast?
21:55 Pit Bulls & Parolees 5/5s.
Battle Scars. A frightening rescue sends the Villalobos team racing into the city in search of a dog reportedly hit by a car. And with kennels at peak capacity, adoption is needed.
22:50 Lone Star Law 4/16s.
Owl Gone Bad. It's the start of deer and oyster season in Texas. Game Wardens Chelsea and Ben come across a young crew with a large number of oysters and an owl is rescued.
23:45 Guardians of Rescue 1/2s.
The Angry King. Rob and vet Moose investigate a claim about dogfighting, while Brian and Face try to help an aggressive dog on a chain. Plus, Dori helps a homeless vet, and his cats.
00:40 Finding Bigfoot 1/3s.
Bigfoot Crossing in Georgia. The team is investigating a Bigfoot sighting in north Georgia when they make a shocking discovery. Are they finally closing in on this legendary beast?
01:35 My Cat From Hell 8/1s.
Scout's Honor. Scout is so afraid of his tormentor, Caramel, he literally lives inside a kitchen cabinet. Allison's adopted Bengal cat, Cheeto, can use the toilet - but attacks her.
02:25 Lone Star Law 4/16s.
Owl Gone Bad. It's the start of deer and oyster season in Texas. Game Wardens Chelsea and Ben come across a young crew with a large number of oysters and an owl is rescued.
03:15 Guardians of Rescue 1/2s.
The Angry King. Rob and vet Moose investigate a claim about dogfighting, while Brian and Face try to help an aggressive dog on a chain. Plus, Dori helps a homeless vet, and his cats.
04:02 Mutant Planet 2/2s.
Borneo. Borneo's 130 million-year-old jungles are home to pygmy forest mammals, weird symbiotic partnerships between plants and animals, and the world's rarest ape.
04:49 Pit Bulls & Parolees 5/5s.
Battle Scars. A frightening rescue sends the Villalobos team racing into the city in search of a dog reportedly hit by a car. And with kennels at peak capacity, adoption is needed.
05:36 Animal Battlegrounds 1/7s.
Frozen Seas. In Arctic seas, determined polar bears hunt the ringed seal, penguins fall prey to leopard seals and starving Arctic foxes pick off vulnerable seabirds.