In today's lecture, we'll discuss the impact of urbanization on local wildlife. One key point is that birds, such as sparrows, have adapted to city life by changing their song frequency to overcome background noise. However, this adaptation comes at a cost: their songs become shorter and less complex, which may reduce their ability to attract mates. Interestingly, a study in London found that sparrows in quieter suburbs sang longer and more varied songs compared to those in busy city centers. This suggests that noise pollution directly affects bird communication and reproduction.
❓ What did the study in London reveal about sparrows?
A. A. Sparrows in city centers sang longer songs than those in suburbs.
B. B. Sparrows in quieter suburbs produced more complex songs.
C. C. Noise pollution had no effect on sparrow song patterns.
D. D. Sparrows in suburbs had shorter songs due to traffic noise.
✅ 正确答案
B. Sparrows in quieter suburbs produced more complex songs.