Urbanisation and its associated habitat loss and fragmentation are considered a major threat to wildlife. In this study, we assessed the predictors of bird species abundance, richness and composition within 70 cells of 500 m by 500 m spread across the five urban areas constituting Ibadan metropolis. A total of 4167 individuals of 55 species belonging to 30 families were recorded. We report that Laughing dove Streptopelia senegalensis, Speckled pigeon Columba guinea and Yellow-billed kite Milvus aegyptius contributed to a greater proportion of bird abundance across sites and Columbidae was the most abundant bird family. Bird species richness increased significantly with tree abundance but decreased significantly with the number of pedestrians. Similarly, foraging guild richness declined significantly with the number of pedestrians. Granivores and scavengers constituted the most abundant foraging guilds. Areas with high pedestrians' traffic were associated with fewer trees and were dominated by fewer numbers of species belonging to a few foraging guilds. This is likely because such areas offer limited foraging opportunities or cover from potential predators. We conclude that improving urban landscape characteristics through revegetation, establishment of green spaces and buffering from human disturbance will improve the composition and richness of avian species in the Ibadan metropolis.

中文翻译：

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西非城市鸟类物种丰富度和组成的预测因子

城市化及其相关的栖息地丧失和破碎被认为是对野生动物的主要威胁。在这项研究中，我们评估了分布在构成伊巴丹大都市的五个城区的 70 个 500 m x 500 m 单元内鸟类物种丰度、丰富度和组成的预测因子。共记录了30科55种4167头个体。我们报告说，笑鸠Streptopelia senegalensis、斑点鸽Columba guinea和黄嘴鸢Milvus aegyptius为整个地点的鸟类丰富度做出了贡献，而鸽科是最丰富的鸟类家族。鸟类物种丰富度随着树木丰度的增加而显着增加，但随着行人数量的增加而显着减少。同样，采集行会的丰富度随着行人数量的增加而显着下降。食粮动物和食腐动物构成了最丰富的觅食行会。行人流量大的区域树木较少，并且属于少数觅食行会的物种数量也较少。这可能是因为这些区域提供的觅食机会有限或无法躲避潜在捕食者。我们的结论是，通过重新植被、建立绿地和缓冲人类干扰来改善城市景观特征将改善伊巴丹大都市鸟类物种的组成和丰富度。