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 actively change their behavior to control their body temperature, rather than relying solely on physiological mechanisms like sweating or shivering. The main point is that behavioral strategies can be just as important as internal ones for surviving in extreme environments. Let me give you two examples. First, consider the desert lizard. In the scorching heat of the day, the lizard doesn't just stay out in the sun. Instead, it alternates between basking in the sun to warm up and retreating into the shade of rocks or burrows to cool down. By doing this, it keeps its body temperature within a narrow, optimal range, allowing it to hunt and move efficiently. Second, think about honeybees. In winter, bees cluster together inside the hive. The bees on the outside of the cluster constantly move inward, while the inner bees move outward. This rotation ensures that no bee stays on the cold outer edge for too long, and the whole cluster maintains a stable temperature around 35 degrees Celsius, even when it's freezing outside. So, you see, these behaviors are not random—they're precise strategies for survival.