This tree chart visualizes the classification of monkey species, starting from the Primates root and branching into Strepsirrhini and Haplorrhini subgroups, with individual species as leaf nodes. Node colors and link strokes vary by taxonomic level using a hierarchical data structure processed by d3.hierarchy and d3.tree. The SVG rendering includes curved paths for links via a custom cubic Bézier generator, with node text and circles styled through CSS. The dataset is embedded directly as a JavaScript object.