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 for survival. The main point is that mimicry isn't just about looking like something else; it's a strategic adaptation that serves a specific purpose, often to avoid predators or to gain an advantage in hunting. Let me give you two examples. First, consider the harmless milk snake. It has evolved to have the same red, yellow, and black banding as the venomous coral snake. Predators that have learned to avoid coral snakes also avoid milk snakes, even though they are not dangerous. This is called Batesian mimicry, where a harmless species imitates a harmful one. Second, think about the orchid mantis. It doesn't imitate a dangerous animal but instead mimics a flower—specifically, an orchid. Its pink and white body and petal-like legs attract insects, which come to pollinate the 'flower.' Instead, they become the mantis's meal. This type of mimicry is aggressive mimicry, where the mimic uses deception to capture prey. So, in both cases, mimicry is a clever survival strategy that directly influences the animal's ability to survive and reproduce.