Data loaded from many_penguins.csv.
Grouped bars show mean for females and males; error bars show ±1 standard deviation.
Each penguin is split down the middle: left half = males, right half = females. Fill height (0–200 mm scale) shows the mean (darker) and ±1 SD (lighter). The rest is grey. Layout is 6 columns × 2 rows (12 species with male data; female half shown in grey where female data is missing; male-only species at the bottom row).