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  2. From Ice Age to Modern Day: How Reindeer Thrive in Extreme Cold

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    These hardy animals have some of the longest migration patterns in the animal kingdom. Reindeer typically migrate to forage for food. Reindeer feed on grass, moss, lichen, and other vegetation.

  3. Discover the Incredible Adaptations That Help Reindeer Thrive ...

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    The bacteria and protozoans in the stomach of a reindeer break down lichen compounds into sugars that the animals use for sustenance. Reindeer need a lot of food to survive a long winter.

  4. Discover the Epic Journey of Reindeer: From Tundras to Forests

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    Reindeer’s cloven hooves are well adapted to survive the cold. During colder months, a reindeer’s hooves toughen up, allowing them to step on frozen, harsh terrain. Their eyes are adapted to ...

  5. Ectotherm - Wikipedia

    en.wikipedia.org/wiki/Ectotherm

    An ectotherm (from the Greek ἐκτός (ektós) "outside" and θερμός (thermós) "heat"), more commonly referred to as a "cold-blooded animal", [1] is an animal in which internal physiological sources of heat, such as blood, are of relatively small or of quite negligible importance in controlling body temperature. [2]

  6. Allen's rule - Wikipedia

    en.wikipedia.org/wiki/Allen's_rule

    Allen's rule - Hare and its ears on the Earth [1]. Allen's rule is an ecogeographical rule formulated by Joel Asaph Allen in 1877, [2] [3] broadly stating that animals adapted to cold climates have shorter and thicker limbs and bodily appendages than animals adapted to warm climates.

  7. Heterothermy - Wikipedia

    en.wikipedia.org/wiki/Heterothermy

    Heterothermy or heterothermia (from Greek ἕτερος heteros "other" and θέρμη thermē "heat") is a physiological term for animals that vary between self-regulating their body temperature, and allowing the surrounding environment to affect it.

  8. Discover the Epic Journeys of Reindeer: Nature’s Long ... - AOL

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    Reindeer are meandering animals. In fact, some reindeer migrate the farthest of any terrestrial animal. They trek north over 600 miles when summer begins and then move south again for winter.

  9. Homeothermy - Wikipedia

    en.wikipedia.org/wiki/Homeothermy

    Cold-blooded animals are often limited by external temperatures, which can affect their ability to hunt, escape predators, and carry out other essential activities. Homeothermy could have provided a selective advantage by allowing animals to be active for longer periods of time, increasing their chances of survival.