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 adjust their behavior to control their body temperature, rather than relying solely on physiological mechanisms like sweating or shivering. The main point I want to emphasize is that behavioral thermoregulation is often more energy-efficient and flexible than internal regulation. Let me give you two examples. First, consider the desert lizard. In the morning, it basks in the sun to warm up, raising its body temperature to become active. But during the hottest part of the day, it retreats to the shade or burrows underground to avoid overheating. This way, it maintains an optimal temperature without wasting energy. Second, think about honeybees. On cold days, they cluster together and shiver their flight muscles to generate heat, keeping the hive warm. On hot days, they spread out and fan their wings to circulate air and cool the hive. These behaviors show how animals use their environment and social actions to regulate temperature efficiently.