Data from Oestradiol reduces female bill colour in a mutually ornamented bird

File includes bill colour metrics data, coordinates in tetrachromatic colorspace for the estimation of perceptual distances, and female blood oestradiol content

本数据集文件涵盖喙部颜色度量数据、用于感知距离估算的四色视觉色彩空间（tetrachromatic colorspace）坐标，以及雌性个体血液中的雌二醇（oestradiol）含量。