Documentary following four seasons in the north American state, beginning with winter where temperatures are cold enough to freeze the ocean, and snowfall is measured in feet not inches. Cameras follow wildlife such as American red squirrels, who battle to hang onto food caches. Meanwhile, on the treeless plains, ancient musk ox are forced to search for theirs.
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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.
Summer has arrived in Alaska. Free of ice, rivers and streams can flow again. This sets the scene for one of the world's greatest migrations, the Alaskan salmon run.
With the arrival of spring, days grow longer and temperatures rise. But spring in Alaska is short. Animals have two months to feed, and start a family, while avoiding predators. Spring is also the time that millions of birds return to Alaska.
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.
Documentary following four seasons in the north American state, beginning with winter where temperatures are cold enough to freeze the ocean, and snowfall is measured in feet not inches. Cameras follow wildlife such as American red squirrels, who battle to hang onto food caches. Meanwhile, on the treeless plains, ancient musk ox are forced to search for theirs.
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