Urbanization has a significant impact on bird populations globally. As cities expand and natural habitats are replaced by buildings, roads, and other infrastructure, many bird species lose their homes and food sources. This loss of habitat leads to a decline in biodiversity as some species may struggle to adapt to urban environments or face competition from more adaptable species. Additionally, factors like pollution, artificial lighting at night disrupting migration patterns, and collisions with buildings pose further threats to bird populations in urban areas.