Urbanization threatens bird populations globally, however many urban habitats present important refugia for wildlife in this rapidly changing landscape. Additionally, birds at the periphery of their global range are more prone to landscape changes and thus these distributions are good indicators of the effects of urbanization on diversity; e.g., bird populations and communities of Cork City, Ireland. The aim of this study was to evaluate effects from urbanization on bird densities (birds/ha), species richness, and species composition throughout Cork City. I surveyed 32 points selected with a stratified random sample within commercial areas, residential habitats, and green spaces throughout Cork City during four breeding seasons between 2016-2019. Species richness was highest in green spaces with 18-34 species; whereas residential habitats had 14-27 species and commercial areas had 9-20 species. The most densely populated species citywide were rock pigeons (5.4-9.1 birds/ha), Eurasian jackdaws (2.9-3.8 birds/ha), rooks (4.5-6.4 birds/ha), European starlings (3.4-5.3 birds/ha), Eurasian blackbirds (2.4-3.6 birds/ha), and house sparrows (2.7-4.5 birds/ha). Overall a lack in urban green space surrounding survey points was most strongly associated with reduced species richness and population estimates. Also, both species richness and population densities tended to be higher in regions with less noise pollution and farther from the urban core. Ultimately these results corroborate other studies stressing the importance of urban green spaces for conserving biodiversity in cities. This is particularly important for the birds of Cork City given that these urban habitats are at the western edge of these species’ distributions.

城市化威胁着全球的鸟类种群，但在这个瞬息万变的景观中，许多城市栖息地为野生动物提供了重要的避难所。此外，在其全球范围外围的鸟类更容易受到景观变化的影响，因此这些分布是城市化对多样性影响的良好指标；例如，爱尔兰科克市的鸟类种群和社区。本研究的目的是评估城市化对科克市鸟类密度（鸟类/公顷）、物种丰富度和物种组成的影响。在 2016 年至 2019 年的四个繁殖季节期间，我在整个科克市的商业区、住宅栖息地和绿地中使用分层随机抽样调查了 32 个点。绿地中物种丰富度最高，有18-34种；而住宅栖息地有14-27种，商业区有9-20种。全市人口最稠密的物种是岩鸽（5.4-9.1 只/公顷）、欧亚寒鸦（2.9-3.8 只/公顷）、白鸦（4.5-6.4 只/公顷）、欧洲椋鸟（3.4-5.3 只/公顷）、欧亚黑鸟（2.4-3.6 只/公顷）和麻雀（2.7-4.5 只/公顷）。总体而言，调查点周围城市绿地的缺乏与物种丰富度和人口估计值的减少密切相关。此外，在噪音污染较少且远离城市核心的地区，物种丰富度和人口密度往往更高。最终，这些结果证实了其他研究，这些研究强调了城市绿地对保护城市生物多样性的重要性。