As temperatures hit minus 60 food becomes scarce, and animals such as foxes and hares shed their colourful coats to camouflage themselves in the snow. The end of winter heralds one of the world's greatest feeding frenzies as large ocean predators target the millions of fish who have found refuge in the Gulf of Alaska.
2017 • Nature
Young animals prepare for their first winter away from their parents, humpback whales return to Alaska's rich feeding grounds and salmon return to spawn in the rivers where they were hatched. But the returning salmon have to negotiate a path past hungry brown bears fattening themselves before they hibernate.
2017 • Nature
Sir David Attenborough gives his unique perspective on over half a century of innovation in wildlife filmmaking. He revisits key places and events in his filming career, reminisces with his old photos and reflects on memorable wildlife footage - including him catching a komodo dragon and swimming with dolphins. Returning to his old haunts in Borneo he recalls the challenges of filming in a bat cave and shows how with modern technology we can now see in the dark.
The Lake Erie water snake, once on the brink of extinction, now looks to be rebounding--thanks mainly to the invasive goby fish that's wreaking havoc on the Great Lakes ecosystem. Can scientists studying this environmental anomaly find a healthy ecological balance?