托福口语 Task 4

Today, we're going to talk about a fascinating concept in animal behavior called 'behavioral thermoregulation.' This is when animals deliberately change their behavior to control their body temperature, rather than relying solely on physiological mechanisms like sweating or shivering. The main point is that behavior can be a highly flexible and energy-efficient way for animals to cope with temperature extremes. Let me give you two examples. First, consider the desert kangaroo rat. In the scorching heat of the day, it stays in its cool underground burrow, only emerging at night when temperatures drop. This avoids overheating and reduces water loss. Second, think about the honeybee. On hot days, worker bees collect water and spread it inside the hive, then fan their wings to increase evaporation, cooling the colony. In cold weather, they cluster together and shiver their flight muscles to generate heat. These behaviors are not just random; they are adaptive responses that help the species survive in challenging environments.