托福口语 Task 4

Today, we're going to talk about a fascinating adaptation in the animal kingdom: mimicry. Specifically, I want to focus on how some animals use mimicry not to hide from predators, but to gain a survival advantage in their environment. One classic example is the mimic octopus. This creature can imitate the appearance and movements of dangerous animals, like the lionfish or sea snake, to scare off potential predators. It doesn't just change color; it also changes its posture and swimming style to match the model. Another example is the hoverfly. This insect looks very similar to a wasp, with yellow and black stripes. However, unlike a wasp, it has no stinger. Birds, having learned to avoid wasps due to their painful sting, will also avoid hoverflies. This protects the hoverfly from being eaten, even though it poses no actual threat. So, you see, mimicry is a powerful tool that can involve both visual and behavioral imitation to enhance survival.