托福口语 Task 4

Today, I want to discuss a fascinating concept in animal behavior: behavioral flexibility. This refers to an animal's ability to adjust its behavior in response to new or changing environmental conditions. It's crucial for survival, especially when resources become scarce or habitats are altered. Let me give you two examples. First, consider the urban raccoon. Traditionally, raccoons foraged near streams and lakes for fish and crayfish. But as cities expanded, some raccoons moved into urban areas. They learned to open trash cans, raid compost bins, and even navigate subway stations to find food. This shift in foraging behavior shows remarkable flexibility. Second, think of the mountain chickadee, a small bird. Normally, these birds cache seeds in various locations to survive winter. However, when researchers introduced artificial feeders that changed the reward locations unpredictably, the chickadees quickly learned to observe each other's caching behavior and steal food from less dominant birds. This social learning and adjustment to new food sources demonstrate another aspect of behavioral flexibility. So, in both cases, animals overcame challenges by modifying their instincts.