Some, like the Arctic ground squirrel and the 13-lined ground squirrel, tend to hibernate. Their breathing rate, heart rate and metabolic rate decrease to conserve energy under these harsh conditions. These include: Not Processing Cold Like Other Warm-blooded Animals It is common to see turtles basking in the sun on rocks and logs. Most mammals and birds are endothermic, or warm-blooded, and can regulate their body temperature by seeking shelter, increasing activity, increasing calorie consumption, or in some cases, hibernating. Antarctic herbivores are the zooplankton, especially krill, these are small cold blooded animals and so convert the energy in phytoplankton into meat more effectively than if they were warm blooded. “It’s easily moved around and easily eaten. However, to combat this problem, warm-blooded animals have a strong immune system. Ectotherms, or cold-blooded animals, must find a way to stay warm or cool as temperatures outside fluctuate. In the fall, frogs go on a crazy eating spree and build up for winter. In winter, cold-blooded animals hibernate. In spring, the animals can move again. And some animals experience physiological changes as winter approaches, building fat reserves, growing thicker fur, and trapping an insulating layer of air against the skin beneath the fur or feathers. Cold-blooded animals are spared by most of the disease-causing germs because they constantly change their body temperatures and make it difficult for the invaders to survive. “Another sugar would do, glycerol would do, but the frogs don’t build that up. Some - Huddling together in large or small groups is a good way of … Cold-Blooded and Hot-Blooded Animals - Photo: Dirk Ercken (frog), Tatyana Vyc (dog)/Shutterstock. Many animals have evolved behaviors to help them beat the cold: herding, denning, burrowing and roosting in cavities are all good defenses. Estivation is when animals are dormant because weather conditions are very hot and dry. Hibernation can last for days, weeks, or months – depending on the species, the time of year, ambient temperature range, and the animal’s overall health. Hunger goes up and they eat everything from moths to ants. Nature went with glucose,” says Storey. (ALLIGATORS/WILDLIFE) Do you ever wonder how a cold-blooded animal could survive in freezing weather? One winter challenge for warm-blooded animals, or endotherms, as they’re scientifically known, is to maintain their internal body temperature in cold conditions. Cold-blooded animals will move on warmer winter days and find water, unlike hibernators who are in a deep sleep and do not move at all. Not all squirrels are active during the winter season. These squirrels have different ways to survive the cold. This type of hibernation is called brumation. They do this by decreasing their metabolic rate and lowering their body temperature. 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