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 similar; it's about gaining a specific advantage, like protection from predators or access to food. Let me give you two examples. First, consider the harmless milk snake. It has evolved to resemble the venomous coral snake, with similar red, yellow, and black bands. Predators that have learned to avoid the coral snake also avoid the milk snake, giving it a survival advantage without being toxic itself. This is called 'Batesian mimicry.' Second, think about the orchid mantis. It doesn't mimic a dangerous animal, but instead mimics a flower — specifically, the petals of an orchid. This camouflage allows it to ambush pollinators like bees and butterflies that come to feed on the flower, making it a highly effective predator. So, in both cases, mimicry provides a clear benefit: protection for the milk snake and predation for the mantis.