托福口语 Task 4

Today we're going to talk about a fascinating behavior in the animal kingdom known as 'mimicry.' Mimicry occurs when one species evolves to resemble another species, often to gain a survival advantage. There are two main types of mimicry: Batesian and Müllerian. In Batesian mimicry, a harmless species mimics the appearance of a dangerous or toxic species to avoid predators. For example, the scarlet king snake, which is non-venomous, has evolved to look like the highly venomous coral snake. Predators that have learned to avoid the coral snake's bright red, yellow, and black bands also avoid the king snake, even though it is harmless. In Müllerian mimicry, two or more dangerous species evolve to look alike, which helps predators learn to avoid them more quickly. For instance, several species of stinging wasps share similar black and yellow stripes. Since they all have the same warning coloration, a predator that gets stung by one wasp will learn to avoid all wasps with that pattern, benefiting the entire group.