雅思听力

🎧 Listening Transcript

Today's lecture focuses on the impact of climate change on migratory birds. Specifically, we'll examine how rising temperatures alter the timing of spring migration. A recent study from the University of Oxford tracked 20 species over a decade. It found that birds now arrive at their breeding grounds, on average, 2.5 days earlier per decade. This shift is problematic because the peak availability of their main food source, insects, has not advanced at the same rate. Consequently, chicks may hatch when food is scarce, reducing survival rates. However, the study also noted that species with shorter migration distances have adapted better than long-distance travelers.