托福口语 Task 4

Today we're going to talk about behavioral adaptation in animals, specifically the concept of 'allelomimetic behavior.' This is when animals in a group copy each other's actions, often leading to synchronized movement. The main point is that this behavior serves a protective function, helping the group avoid predators or navigate efficiently. Let me give you two examples. First, consider a school of sardines. When a predator like a tuna approaches, the sardines at the edge detect the threat and suddenly dart in a different direction. The others immediately mimic this movement, and the whole school shifts as one unit. This rapid, coordinated response confuses the predator, making it hard to single out an individual fish. Second, think of a flock of starlings, which perform murmurations at dusk. As they fly, each bird observes its neighbors and matches their speed and direction within milliseconds. This creates a dense, swirling cloud that appears to move as a single entity. This synchronization makes it difficult for a hawk to target one bird, dramatically reducing the chance of a successful attack. So, in both cases, the copying behavior is not just random—it's a survival strategy that enhances the safety of the group.