In today's lecture, we'll discuss the impact of urbanization on local wildlife. One key point is that while some species, like pigeons and rats, thrive in cities, others, such as certain birds and insects, struggle to adapt. A recent study in London found that the population of house sparrows has declined by 70% over the past two decades, mainly due to a lack of nesting sites and food sources. However, the study also noted that green roofs and community gardens can help mitigate this decline by providing habitats and food. Interestingly, the research highlighted that the presence of domestic cats was not a significant factor in the sparrow's decline, contrary to popular belief.
❓ Según la conferencia, ¿cuál es la razón principal del declive de los gorriones comunes en Londres?