雅思听力

🎧 Listening Transcript

Today, in our environmental science lecture, we're discussing the impact of urban development on local wildlife. A recent study in Melbourne focused on the effect of city parks on bird populations. Surprisingly, researchers found that while larger parks supported more species, smaller parks attracted a greater number of individual birds per hectare. This is because smaller green spaces often provide dense shrubs and diverse food sources, which appeal to common species like sparrows and magpies. However, rare species, such as the powerful owl, were only observed in parks larger than 50 hectares. The study suggests that city planners should prioritize a mix of both large and small green areas to maximize biodiversity.