托福口语 Task 4

Today we're going to talk about a fascinating concept in animal behavior called 'tool innovation' — when animals not only use objects as tools but also modify them in new ways to solve problems. This is different from simple tool use, like a bird cracking a nut with a rock. Tool innovation requires cognitive flexibility and problem-solving. Let me give you two examples. First, consider the New Caledonian crow. In an experiment, these crows were presented with a piece of meat inside a vertical tube and a straight piece of wire. They couldn't reach the meat with the straight wire. But one crow, after trying and failing, bent the wire into a hook and used it to pull out the meat. This shows the crow mentally represented the goal and created a novel tool. Second, think of the coconut octopus. In the wild, octopuses in Indonesia were observed carrying two coconut shell halves. When threatened by predators, they would assemble the shells around their bodies, creating a portable shelter. This wasn't learned from others; each octopus innovated this solution independently. Both examples illustrate that tool innovation arises when animals face a novel problem and need to adapt objects in creative ways.