雅思听力

🎧 Listening Transcript

In today's lecture, we will discuss the impact of urbanization on bird populations. Recent studies show that while some species adapt well to city life, others decline sharply. For example, the house sparrow, once common in London, has decreased by 70% since the 1990s. However, peregrine falcons have thrived, nesting on tall buildings and hunting pigeons. Interestingly, researchers found that noise pollution affects birds' songs, making them sing at higher pitches to be heard. This adaptation, though, may reduce their ability to attract mates in quieter rural areas. So, urban birds face trade-offs, and conservation efforts must consider these unique challenges.