托福口语 Task 4

Today we're going to talk about a fascinating concept in biology called 'behavioral adaptation through observational learning' – specifically, how animals can acquire new survival skills by watching others, rather than through instinct or trial-and-error. This is not just about imitation; it's about learning a specific behavior that solves a problem. Let me give you two examples from different environments. First, consider the Japanese macaque monkeys on Koshima Island. In the 1950s, researchers observed a young female monkey named Imo who discovered she could wash sweet potatoes in the sea, removing sand and improving their taste. Soon, other monkeys, especially her peers and mother, learned this by watching her, and eventually the behavior spread through the entire troop. This wasn't innate – they copied a beneficial technique. Second, think about urban birds, like blackbirds in Europe. They learned to open the foil tops of milk bottles left on doorsteps. Initially, a few birds figured it out, but then others observed and replicated the action, allowing them to access a rich food source. So, in both cases, the key is that the behavior persisted because it was advantageous and passed on through social learning.