Characteristic Adelie, N = 1521 Chinstrap, N = 681 Gentoo, N = 1241 p-value2
Island


<0.001
    Biscoe 44 (29%) 0 (0%) 124 (100%)
    Dream 56 (37%) 68 (100%) 0 (0%)
    Torgersen 52 (34%) 0 (0%) 0 (0%)
Bill Length (mm)


<0.001
    Median (IQR) 38.8 (36.8, 40.8) 49.6 (46.4, 51.1) 47.3 (45.3, 49.6)
Bill Depth (mm)


<0.001
    Median (IQR) 18.40 (17.50, 19.00) 18.45 (17.50, 19.40) 15.00 (14.20, 15.70)
Flipper Length (mm)


<0.001
    Median (IQR) 190 (186, 195) 196 (191, 201) 216 (212, 221)
Body Mass (g)


<0.001
    Median (IQR) 3,700 (3,350, 4,000) 3,700 (3,488, 3,950) 5,000 (4,700, 5,500)
Sex


>0.9
    female 73 (50%) 34 (50%) 58 (49%)
    male 73 (50%) 34 (50%) 61 (51%)
1 n (%)
2 Pearson’s Chi-squared test; Kruskal-Wallis rank sum test