- 2018年01月24日16:25 来源：小站整理
- 参与（0） 阅读（1442）
Many animals use coloration to protect themselves from predators. One defensive strategy involving the use of coloration is what is known as revealing coloration. Animals employing this strategy have an area of bright color on some part of their body, this bright color is usually hidden from predators’view. When approached by a predator, the animal suddenly reveals the area of bright color, this unexpected display of color startles or confuses the predator and provides the would-be-prey with an opportunity to escape.
Now listen to part of a lecture from a biology class.
(male) There’s a large tropical insect called the Peanut Bug. Yes, like the peanuts you eat. Um, and the Peanut Bugs front wings are colored so they blend in with their surroundings. But its back wings, which are usually closed and hidden, have these bright colorful spots on them. And when the Peanut Bugs are attacked, it suddenly opens its back wings and out pop these bright colors. And that surprises the predator and gives the Peanut Bug a chance to get away.
Um, then you have a butterfly called the morpho butterfly. And parts of the morpho butterfly wings are very shiny. They reflect a lot of sunlight. When this butterfly is resting, this shiny part of its wings is hidden. Now morpho butterflies are often attacked by birds. So when a bird approaches, the morpho flies away. And when the morpho flaps its wings, all the bird can see are flashes of light reflected from the morpho’s wings. Those flashes of light make it very difficult for the bird to follow the morpho. And the morpho is usually able to get away.
Using the example of the Peanut Bug and the morpho butterfly, explain the concept of revealing coloration.
Revealing coloration is a defensive strategy used by animals to protect themselves from predators. The professor uses two examples to explain this concept. The first example is peanut bug. The peanut bug’s back wings are usually closed and have bright colorful spots on them. When peanut is attacked, it suddenly opens its back wings to show its bright colors that surprise its predators. So it reveals the usually hidden bright color in back wings to startle its predators. Then the peanut bug can escape. The second example is morpho butterfly. Parts of Morpho Butterfly’s wings are very shiny. When the butterfly is resting, the wings are hidden. When the butterfly is attacked by birds, it flaps the wings to reflect flashes of light that can make it hard for birds to catch the butterfly. In other words, it reveals the bright color of its wings to confuse its predators. So the Morpho Butterfly can get away.