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Mammals and birds aren’t meant to live in the extreme cold, but a handful of species have turned the inhospitable north into their homes and carved a niche in one of the most challenging ecosystems on Earth. In this documentary, narrated by wildlife expert Danielle Dufault, we take a deep look at five species of five different families as they prepare for the lean winter months. By exploring the lives and evolutionary adaptations of these fantastic animals, gain a greater understanding of the precarious living conditions and a broader picture of their ecosystems, including the other plants.