Caribou
Reindeer exist, and they’re known as Caribou in Eurasia. Even though they don’t carry a sleigh when they migrate more than 2,000 miles, it doesn’t mean their journey is any less spectacular. They’ve adapted to life in the Arctic and subarctic region, with annual migrations that are solely driven by the need to find food. They also migrate to ensure the longevity of their species and to avoid predators.
With the longest terrestrial migration routes of any land mammal, they cover thousands of miles between wintering areas based on the availability of food and weather conditions. They have to face the harsh cold, and limited daylight, and navigate difficult terrain (Earth).