| 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%) | 
 | 
 
 
 
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