托福口语 Task 4

Today, let's talk about a fascinating concept in animal behavior: behavioral flexibility. This refers to an animal's ability to change its behavior in response to new or changing environmental conditions. It's crucial for survival, especially when food sources shift or predators appear. Let me give you two examples. First, consider the urban raccoon. Traditionally, raccoons foraged near water sources, catching fish and frogs. But in cities, they've learned to open garbage bins and even decode simple locking mechanisms on dumpsters. This shows an ability to learn and adapt to a completely new food source. Second, think about the mockingbird. In quiet rural areas, they sing a series of simple, repetitive songs. However, when they move to noisy urban environments, they change their singing behavior: they sing at higher frequencies and in shorter bursts to be heard above the traffic. This demonstrates a shift in communication strategy due to a new, noisy setting. So, through these examples, we see that behavioral flexibility is not a fixed trait, but a dynamic tool that allows animals to thrive in diverse and changing habitats.