Hibernating Hedgehog

Thermoregulation Strategies Used by Hedgehogs

Hedgehogs are small, spiny mammals found throughout Europe, Asia, and Africa. They are nocturnal animals that are active during the night and sleep during the day in nests they build from leaves and grass. To maintain their body temperature, hedgehogs have developed several thermoregulation strategies. The following are some of the strategies used by hedgehogs:

  1. Hibernation

During the winter months, when temperatures are low and food is scarce, hedgehogs enter a state of hibernation. This is a state of reduced metabolism, where the hedgehog’s body temperature drops and its heart rate and breathing slow down. By reducing their metabolic rate, hedgehogs are able to conserve energy and survive the winter months.

  1. Brown Fat

Hedgehogs, like other mammals, have a type of fat called brown fat. Unlike white fat, which is used for energy storage, brown fat is used to generate heat. When the hedgehog is cold, brown fat is activated, and it generates heat through a process called thermogenesis. Brown fat is particularly important for hedgehogs, as they have a low body mass-to-surface area ratio, which means they lose heat quickly.

  1. Quills

Hedgehogs have a covering of sharp spines called quills, which protect them from predators. The quills also help to insulate the hedgehog, trapping a layer of air close to its skin, which acts as an insulator.

  1. Nest Building

Hedgehogs are adept at building nests, which they use to regulate their body temperature. They will build their nests in sheltered areas, such as under bushes or in piles of leaves. By building a nest, the hedgehog can insulate itself from the outside environment and maintain a stable body temperature.

  1. Basking

Hedgehogs will often bask in the sun during the day to regulate their body temperature. By exposing themselves to sunlight, they can increase their body temperature and stay warm. This is particularly useful in cooler weather when they need to warm up.

  1. Torpor

In addition to hibernation, hedgehogs can enter a state of torpor, which is a state of reduced metabolism that is shorter than hibernation. During torpor, the hedgehog’s body temperature drops, and its heart rate and breathing slow down. This state allows the hedgehog to conserve energy and survive periods of cold weather or food scarcity.


In summary, hedgehogs have developed several thermoregulation strategies to maintain their body temperature within a narrow range, regardless of external temperatures. These include hibernation, brown fat, quills, nest building, basking, and torpor. By effectively regulating their body temperature, hedgehogs are able to survive and thrive in a variety of environments, including those with extreme temperature fluctuations.