National Geographic WILD HD Thursday

Highlights from the series, including bears, birds and bison battling danger and instinct to protect their young each spring

Keepers try to find out why a Muntjac deer is suffering from mysterious seizures, and a CT scan reveals that a loris has an abscess dangerously close to the brain

Captain Dino finds himself in dangerous circumstances without a deckhand when his crew is plagued by fatigue, while Taylor's boat hauls in a huge catch of salmon

Animals that have evolved deadly natural weaponry, including sharks with fearsome jaws, the hammer-like foot of the secretary bird, and scorpions with toxic stingers

From lightning strikes to cat fights, the summer season at PVS gets off with a bang

Field workers help the homeless people staying at the station, while enforcement officers deal with an aggressive can collector

The series concludes with life in the region during the winter

Wildlife in Spain's Sierra de Gredos National Park, including Spanish ibex, golden eagles and otters in environments ranging from glacial cirques to the summit of Almanzor

Documentary following naturalist Casey Anderson and his best friend, grizzly bear Brutus, as they trek from Yellowstone National Park to Alaska's Kodiak Island

At The Yukon Wildlife Preserve, Dr Oakley treats a young caribou that could go blind, as well as a mountain goat with a life-threatening injury

An unusual line-up of patients tests vet Dr Michelle Oakley's mettle, including a Himalayan yak that shocks everyone when it wakes up during surgery

An abscessed tooth turns nasty for an aging sheep, Lulu the giraffe gives birth, and a dangerously skinny skink confounds the vet staff

First of a two-part documentary capturing the changing seasons and the life cycles of wildlife in Spain and Portugal's forests, beginning with spring and summer

Part two of two. Autumn and winter in the Mediterranean forests see new offspring having to learn to fend for themselves, while inter-species rivalry is at a peak

The team tries to understand what connects a spate of shark bites from across the world, all happening within a few days

Margot, Matty, Billy, Emilie and Gilbert negotiate some pre-winter challenges as they continue to improve their northern homesteads

Documentary investigating deadly ocean dwellers, including creatures armed with lethal poison, sharp-toothed barracudas and scavenging piranhas

A python gatecrashes a wedding, and a neighbourhood is terrorised by a huge black mamba. Simon and Siouxsie also encounter Africa's largest cobra in a swimming pool

Charles joins Dr Pol as he starts the day by heading out to a stable to check the status of some horses

Dr Oakley rushes to save a Siberian Husky who has ingested a bottle of pills. Later, they have to tackle the dagger-like talons of a grumpy Great Horned Owl

A pregnant Sonta Roach hunts bull moose, Johnny Rolfe builds an underground refrigerator and Mario seeks a new source of protein along the Chatanika River