Page 1
Some children notice that certain birds seem rarer in busy cities than they once were.
有些孩子会发现，在繁忙的城市里，某些鸟好像比以前更少见了。正文预览
Page 2
Bird numbers can change when a city changes how much safe space, food, and nesting places are available.
当一座城市里安全空间、食物来源和筑巢位置发生变化时，鸟的数量也可能跟着变化。
Page 3
Old trees, shrubs, wetlands, and quiet corners can matter a lot to birds looking for shelter and homes.
老树、灌木、湿地和相对安静的角落，对寻找栖身地和家的鸟来说都很重要。
Page 4
When more land is covered by roads, glass, and hard surfaces, some birds may find the city harder to live in.
当越来越多土地被道路、玻璃和硬质地面覆盖时，一些鸟就会发现城市变得更难生存。
Page 5
Noise, pollution, bright lights at night, and fewer insects can also affect birds' daily life.
噪音、污染、夜晚过强的灯光，以及昆虫变少，也都可能影响鸟的日常生活。
