In nature, you may see manyinsects (昆虫) and animals of different colors. Have youever wondered why?
Locusts(蝗虫) are super delicious food for birds, but it is not always an easyjob for birds to catch them. It is neither because locusts are good jumpers orrunners nor because they are smarter than their enemies. The reason is that thecolors of locusts change with the colors of crops. When crops are young,locusts look green. But when autumn comes, locusts change to the yellow andbrown color as crops do.
Brown bears, tigers andother animals move quietly through forests. They can't be seen easily by their enemies. This is because they havecolors similar to the trees. For the same reason, polar bears that live on aland of snow and ice are white. Butterflies(蝴蝶) and bees living among the flowers are colorful like flowers. Soilinsects are mostly dark-colored and they live under the soil(土壤) in a dark and wet environment. However, insects with colorsdifferent from plants can easily be found and eaten by others. So in order tosurvive,they have to hide themselves in the daytime and appear only at night.
Have you ever noticed someeven stranger acts? The ink(墨) fish in the sea can sendout some very black ink when it faces danger. As the ink spreads over, itsenemies will find themselves suddenly in a dark world. At the same time the inkfish immediately swims away. That is how it keeps itself safe though it is notstrong at all.
