How does the tortoise know about the weather change?

Feel the temperature change through your own skin epidermis. You know, reptiles are very sensitive to these things. As long as the temperature rises or falls slightly, they can feel it for the first time. For example, when the weather is colder than usual, the active cells in their bodies will contract, and their hands and feet will involuntarily freeze. On the contrary, when the temperature rises, the active cells in the body start to move again, and they will hunt and play.

As we all know, almost all reptiles need to absorb enough heat to move.

Besides, most animals can feel the change of the weather. ...