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 regulate their body temperature, rather than relying solely on physiological mechanisms like sweating or shivering. The main point is that these behaviors are often surprisingly clever and can be critical for survival in extreme environments. Let me give you two examples. First, consider the desert lizard. In the scorching heat of the day, the lizard will alternate between basking in the sun to warm up and retreating into the shade of rocks or burrows to cool down. This shuttling behavior allows it to maintain a fairly constant body temperature, even when the air temperature swings dramatically. Second, think about honeybees. When the hive gets too hot in summer, worker bees will collect water and spread it over the hive's surface, then fan their wings to increase evaporation, effectively air-conditioning the hive. When it gets too cold, they cluster together and shiver their flight muscles to generate heat. These behavioral strategies are just as important as any internal thermostat.