Light conditions and the evolution of the visual system in birds

Materials contain R codes with analyses (*.R), phylogenetic trees (*.tre) and dataset (SupplementaryDataset1.xlsx). Dataset contains variables expressing visual system architecture and exposure to environmental light across birds: -eye axial length -cornreal diameter -optic tectum volume -visual wulst volume -nocturnal habits -prefered habitat These variables were extracted from literature and open sources for 760 avian species.本数据集配套材料包含用于分析的R代码文件（*.R）、系统发育树文件（*.tre）以及数据集文件（SupplementaryDataset1.xlsx）。该数据集收录了760种鸟类的视觉系统结构特征与环境光照暴露相关变量，具体如下： - 眼轴长度 - 角膜直径 - 视顶盖体积 - 视觉隆突（visual wulst）体积 - 夜行习性 - 偏好生境 所有变量均从公开文献与开源资源中提取获得。