Mouseover to each section of the bar to know more about the data. For this data, they have investigated 342 penguins. For gender, there are 168 male penguins, 165 female penguins, and 9 of those are unknown. For island, there are 167 penguins from Biscoe island, 124 penguins from Dream, and 51 of those are from Torgersen island.