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Reindeer evolved during the last ice age to withstand temperatures as low as minus 94°F (minus 70° C. Yes, you read that right. This is an amazing feat, accomplished only by a select group of ...
There is little food for animals to eat in the Arctic. Reindeer utilize their powerful hooves and antlers to sift through snow and ice and eat foods such as: Grasses. Bushes. Lichen. Sedges. Birch ...
Reindeer also travel, feed, and rest together in the wild, sometimes forming super-herds of up to 500,000 animals. Tundra reindeer migrate between forest and tundra in these massive groups in an ...
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]
Penguins and many arctic birds use these exchangers to keep their feet at roughly the same temperature as the surrounding ice. This keeps the birds from getting stuck on an ice sheet. Other animals, like the leatherback sea turtle , use the heat exchangers to gather, and retain heat generated by their muscular flippers. [ 5 ]
It is thought that adaptations to cold temperatures (cold-eurythermy) in animals, despite the high cost of functional adaptation, has allowed for mobility and agility. This cold eurythermy is also viewed as a near necessity for survival of the evolutionary crises, including ice ages, that occur with relative frequency over the evolutionary ...
Baby reindeer are called calves, as are baby moose and cows. However, other baby deer species are commonly called fawns, making it even more interesting that baby reindeer do not have the same ...
Birds, especially waders, often have very well-developed heat exchange mechanisms in their legs—those in the legs of emperor penguins are part of the adaptations that enable them to spend months on Antarctic winter ice. [9] [10] In response to cold, many warm-blooded animals also reduce blood flow to the skin by vasoconstriction to reduce ...