托福口语 Task 4

Today, we're going to talk about a fascinating phenomenon in animal behavior known as 'behavioral thermoregulation.' Essentially, many animals don't just passively endure temperature changes; they actively adjust their behavior to maintain a comfortable body temperature. This is crucial for survival because extreme temperatures can affect their ability to find food, avoid predators, or reproduce. Let me give you two examples. First, consider the desert iguana. When the sun is too hot, the iguana doesn't stay exposed. Instead, it climbs onto rocks or plants to get into cooler air currents, or it burrows into the sand to escape the heat. This allows it to stay active during the hottest part of the day when predators are less active. Second, think about the honeybee. In a hive, when temperatures soar, worker bees will fan their wings at the entrance to circulate air and cool the hive. Conversely, on cold days, they cluster together tightly to generate and retain heat. So, through these behaviors, animals can effectively manage their body temperature without relying solely on physiological mechanisms.