Tundra is the cold, partly frozen region near the North Pole. It is covered with grasses and other low-growing plants, including the lichen known as reindeer moss. Many familiar trees such as willows and birches live in the tundra too, but they are stunted and low growing. Despite the cold, the tundra is covered with flowers in the spring, and huge numbers of flies pollinate them. Mosquitoes are present in vast numbers, biting the mammals that live in this region.
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