托福口语 Task 4

Today, we're going to discuss a fascinating concept in biology called 'mimicry.' Mimicry occurs when one species evolves to resemble another species, often to gain a survival advantage. There are different types of mimicry, but I want to focus on two: Batesian mimicry and Müllerian mimicry. In Batesian mimicry, a harmless species imitates a dangerous or unpalatable one to fool predators. For example, the scarlet king snake, which is harmless, has colors very similar to the venomous coral snake. Predators avoid the king snake because they mistake it for the coral snake. On the other hand, Müllerian mimicry involves two or more dangerous species that resemble each other, which reinforces the warning signal. For instance, several species of poisonous butterflies, like the monarch and the viceroy, share similar bright orange and black patterns. Predators quickly learn to avoid all butterflies with that pattern, benefiting each species. So, while Batesian mimicry deceives predators, Müllerian mimicry is a mutual defense system.