Turtles are afraid of cold.

1. Hibernation: When the temperature is lower than 10 degrees Celsius, the tortoise will go into hibernation, which is a special way for the tortoise to adapt to the cold winter.

2. Open your mouth: When it gets cold, the tortoise feels uneasy and upset. It opens its mouth.

3, huddled together: the turtle is unwell and has abnormal symptoms of opening his mouth together.