This visualization shows the distribution of iris flower counts across three species—setosa, versicolor, and virginica—using a simple bar chart. The code loads the Iris dataset via a remote CSV URL and uses D3 v6 APIs such as `d3.rollup`, `scaleBand`, `scaleLinear`, and axis functions to aggregate and display the data as colored rectangles in an SVG. Each bar is color-coded by species, with hover effects that increase opacity. The chart includes labeled axes for species and count, rendered within a full-window responsive layout.