Earth's Seasonal Secrets: Winter

Documentary exploring how animals all over the world rise to the challenge of surviving the winter. While some creatures face an up-hill struggle to survive, a colder climate plays to the advantage of others, who quickly set about making use of inventive means to seize the huge opportunities the season brings. Caribou become `ice road" travellers as the ground under-foot becomes slippery, and stoats build their own fur beds, snow monkeys set about finding warm baths, and even Emperor penguins - who are build to face extreme low temperatures - find their own way to endure the world's most savage winter conditions. Narrated by Andrew Scott