托福口语 Task 4

Today we're going to talk about a fascinating concept in biology called 'mimicry', specifically when an animal evolves to look like another species to gain a survival advantage. This is not just about camouflage, but about deceiving predators or prey. Let me give you two clear examples. First, consider the harmless milk snake. It has evolved to have the same red, black, and yellow banding as the venomous coral snake. Predators like birds have learned to avoid the coral snake's bright colors, so they also avoid the milk snake, even though it's completely harmless. This is called Batesian mimicry, where a harmless species imitates a dangerous one. Second, think about the orchid mantis. This insect's body and legs resemble the pink and white petals of the orchid flower. It waits motionless on the flower, and when a bee or butterfly comes to feed, the mantis ambushes it. This is aggressive mimicry, where the predator mimics something attractive to its prey. So, in both cases, mimicry is a powerful tool that helps the animal either escape being eaten or catch its own food.