托福口语 Task 4

Today, we're going to talk about a fascinating concept in biology called 'mimicry'—specifically, how some animals have evolved to imitate other species to survive. Now, mimicry isn't just about looking like another animal; it can also involve behavior or sounds. The key point is that mimicry provides a survival advantage, often by deceiving predators or prey. Let me give you two examples. First, consider the monarch butterfly. Its bright orange and black pattern warns predators that it's toxic. The viceroy butterfly, however, is not toxic, but it has evolved to look almost identical to the monarch. This resemblance protects the viceroy because predators, having learned to avoid monarchs, also avoid viceroys. Second, think about the mimic octopus, found in Southeast Asian waters. This octopus can change its color, shape, and even its swimming style to imitate dangerous creatures like lionfish or sea snakes. For instance, when threatened, it will spread its arms and undulate them to mimic a venomous sea snake, scaring off potential attackers. So, in both cases, mimicry directly increases the animal's chances of survival by fooling other species.