According to researchers, tarantulas lose coordination when exposed to warm conditions. But speed of tarantulas stays rapid and furious.

It has been revealed that some species of these spiders are known for speed but they always not move easily, mainly in warm conditions. Spiders do not make use of muscles as their main driving force to move limbs. In its place a liquid called hemolymph, like blood, flows into the legs and cause them to extend.

The researchers said that the joint closer to the body normally extends before the other. After that flexor muscles drive bending at the joints and hemolymph pushed back into the arachnid's body. Changes in temperature can affect this liquid, potentially changing capability of the spider to walk.

As per the researchers, a white dot was painted on every of two joints on the limbs of eight adult Texas brown tarantulas. They said they observed the creatures as they ran down a runway. These tests were performed when the environment was kept at four different temperatures: 59, 75, 88, and 104 degrees Fahrenheit.

The researchers recorded angles between the dots on the spider limbs when the spiders walked down the incline. At Colder temperatures, slower, but more coordinated movements from the spiders were observed but at warmer temperatures the effect was opposite.

"But at the higher temperatures, and the faster running speed, the two joints were less coupled. The two joints on each leg were a lot less well-controlled at the higher temperatures”, said Anna Ahn from Harvey Mudd College.

Anna Ahn also said the spiders increased their sprint speed 2.5-fold over the temperature range by altering their stride frequency but not stride length. The researchers said the temperature played an important role in the speed at which the spiders move. It has also been revealed that tarantulas begin to act clumsy when exposed to warm conditions.