Bats using brown fat to wake up!

Thermoregulation Strategies Used by Bats

Bats are fascinating mammals that have developed a range of thermoregulation strategies to maintain their optimal body temperature for survival and reproduction. Unlike other mammals, bats are able to fly and have a high metabolic rate, which means that they require a constant supply of energy to maintain their body temperature. To accomplish this, they have developed a range of thermoregulation strategies, including the use of brown fat.

How does a bat wake up fram hibernation?
  1. Roosting

One of the primary thermoregulation strategies used by bats is roosting. Bats will roost in a variety of locations, such as caves, trees, and buildings, to avoid temperature extremes. During hot weather, bats may roost in cooler locations to avoid overheating, while during colder periods, they may seek out warmer locations to prevent hypothermia.

  1. Hibernation

Many bat species hibernate during the winter months when food sources are scarce. During hibernation, their metabolic rate slows down, and their body temperature drops to match the ambient temperature. By lowering their body temperature, bats conserve energy and are able to survive for long periods without food.

  1. Echolocation

Bats use echolocation to navigate and find food in their environment. By emitting high-pitched sounds and listening for the echoes, bats can locate objects in complete darkness. This ability allows them to find food sources more efficiently and conserve energy by avoiding unnecessary flights in search of prey.

  1. Wing-spreading

Bats can regulate their body temperature by spreading their wings. By increasing the surface area of their body exposed to the environment, bats can lose heat more effectively during hot weather. Conversely, they can also minimize heat loss during cold weather by folding their wings close to their body.

  1. Licking

Some species of bats will lick their fur to regulate their body temperature. By moistening their fur with saliva, bats can cool down their body temperature by evaporation. This is particularly effective during hot weather when they need to dissipate excess heat.

  1. Migration

Certain bat species migrate to different locations to avoid temperature extremes. For example, some bat species will migrate to warmer locations during the winter months, while others will migrate to cooler locations during hot weather.

  1. Use of Brown Fat

In addition to these thermoregulation strategies, bats also have a unique adaptation that allows them to regulate their body temperature using brown fat. Brown fat is a type of fat tissue that generates heat when activated. Unlike white fat, which stores energy, brown fat burns energy to produce heat.

Bats have a higher concentration of brown fat than other mammals, and they can activate it to generate heat when needed. During cold weather, bats can increase their metabolic rate to activate their brown fat and generate heat. This allows them to maintain their body temperature even in extremely cold environments.


In summary, bats use a range of thermoregulation strategies to maintain their optimal body temperature for survival and reproduction. These include roosting, hibernation, echolocation, wing-spreading, licking, migration, and the use of brown fat. By effectively regulating their body temperature, bats are able to survive and thrive in a wide range of environments, including those with extreme temperature fluctuations.

What’s for dinner?

Brow fat is special, it’s a kind of magic, brown fat doesn’t insulate, it produces warmth. This article on explains how it works :

Or check Wiki for more details