题型：阅读选择 题类： 难易度：普通
浙江省绍兴市新昌县七星中学2024-2025学年九年级上学期期中英语试题
You may see some herons（鹭） in the park using bread or insects as a tool to catch fish. This is just one of the ways in which birds have changed their living habits because of humans' activities. Now, a new study has found that birds that are able to change their behaviors（行为） in this way are less likely to die out. These changes may include adding new food to their diet, developing new hunting skills, or living in a new environment.
Scientists studied reports of new behaviors among different kinds of birds around the world. The study includes more than 3,800 new behaviors among 8,600 kinds of birds. They discovered that the more new hunting skills the birds learn, the larger population they will have.
However, scientists also found that innovation（革新） can only protect birds from changes in their living place, but not from over-hunting or the danger from other animals. For example, some animals are very dangerous to some birds: snakes can eat little birds; some hungry mice steal birds' eggs. Above all, humans often mean the greatest danger to birds. They always take up too much space, cut down trees and even cause various kinds of pollution.
This shows that, unlike what is usually believed, the ability of innovation protects animals from some but not all of the rapid changes in the environment.
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