Ectotherm Tarantula

Thermoregulation Strategies Used by Tarantulas

Tarantulas are large, hairy spiders that are found in many parts of the world. Like all other spiders, they are ectothermic and rely on external factors to regulate their body temperature. To maintain their optimal body temperature for survival and reproduction, tarantulas have developed a range of thermoregulation strategies.

  1. Sun-basking

One of the primary thermoregulation strategies used by tarantulas is sun-basking. Like other ectothermic animals, tarantulas rely on external heat sources to regulate their body temperature. When their body temperature drops below their optimal level, they will bask in the sun to warm up. They may also orient themselves to maximize exposure to the sun’s rays.

  1. Burrowing

Tarantulas can also regulate their body temperature by burrowing into the ground. By burying themselves, they can take advantage of the cooler temperatures found below the surface during hot weather. They may also emerge from the ground during cooler periods to warm up in the sun.

  1. Postural adjustments

Tarantulas can also make postural adjustments to regulate their body temperature. For example, they may adopt a position that exposes more of their body to the sun or move to a cooler, shaded area when temperatures become too high.

  1. Behavioral adaptations

Tarantulas can make behavioral adaptations to regulate their body temperature. For example, they may alter their activity patterns to avoid periods of high heat or low temperatures. They may also seek out specific microhabitats, such as under rocks or in crevices, that provide optimal temperatures for their survival and reproduction.

  1. Evaporative cooling

Tarantulas can also use evaporative cooling to regulate their body temperature. They have specialized organs called book lungs, which are used for respiration. By increasing the rate of respiration, tarantulas can release excess heat through the evaporation of moisture from the book lungs.

  1. Hair-raising

Tarantulas can also raise their body hair to create a layer of insulation, which can help to regulate their body temperature. The hairs trap a layer of air close to the skin, which acts as an insulator to keep the tarantula warm.


In summary, tarantulas use a range of thermoregulation strategies to maintain their optimal body temperature. These include sun-basking, burrowing, postural adjustments, behavioral adaptations, evaporative cooling, and hair-raising. By effectively regulating their body temperature, tarantulas are able to survive and reproduce in a wide range of environments.